<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:e3c838c8-6768-4957-b752-dda17588db11,g:cfbbb06e-7b31-4a88-9c95-a2b0205e66c6-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.mongodb.com/role/DocumentandEntityInformationDocument" xlink:type="simple" xlink:href="mdb-20210131.xsd#DocumentandEntityInformationDocument"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/DocumentandEntityInformationDocument" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="mdb-20210131.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_c2683966-fe41-42a3-8fc5-b2d6ee635873" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_02510fc4-1b9f-458c-8b80-56896650325e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_c2683966-fe41-42a3-8fc5-b2d6ee635873" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_02510fc4-1b9f-458c-8b80-56896650325e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_4529d195-bf4a-4e64-ac06-853643bb36ec" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_c2683966-fe41-42a3-8fc5-b2d6ee635873" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_4529d195-bf4a-4e64-ac06-853643bb36ec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_001c3226-d734-41de-8e46-c526ffe83350" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_c2683966-fe41-42a3-8fc5-b2d6ee635873" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_001c3226-d734-41de-8e46-c526ffe83350" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCostsCurrent_fe4c76e1-92ff-40eb-bf6b-a7689f8bf4c0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredCostsCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_c2683966-fe41-42a3-8fc5-b2d6ee635873" xlink:to="loc_us-gaap_DeferredCostsCurrent_fe4c76e1-92ff-40eb-bf6b-a7689f8bf4c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_c014b91b-ea59-44ee-a455-f1cbb8184838" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_c2683966-fe41-42a3-8fc5-b2d6ee635873" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_c014b91b-ea59-44ee-a455-f1cbb8184838" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_cfbf3e11-1bd5-4162-8e2a-a93236fc8941" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_3fd79fe8-6612-44f3-9216-adac137becbd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_cfbf3e11-1bd5-4162-8e2a-a93236fc8941" xlink:to="loc_us-gaap_Liabilities_3fd79fe8-6612-44f3-9216-adac137becbd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_582d9805-5a99-4e5d-a07c-49eb9f7c55e6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_cfbf3e11-1bd5-4162-8e2a-a93236fc8941" xlink:to="loc_us-gaap_CommitmentsAndContingencies_582d9805-5a99-4e5d-a07c-49eb9f7c55e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_b13f9173-dd91-4cef-9f28-520bec36f591" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_cfbf3e11-1bd5-4162-8e2a-a93236fc8941" xlink:to="loc_us-gaap_StockholdersEquity_b13f9173-dd91-4cef-9f28-520bec36f591" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_7ff23424-368a-428f-8148-2cfb89ac68bc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_cfbf3e11-1bd5-4162-8e2a-a93236fc8941" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_7ff23424-368a-428f-8148-2cfb89ac68bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_6f89973c-22eb-42f4-855d-e99ff15ecf64" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_001aa9a4-cb84-482e-86b7-ec8c9f2c9131" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f89973c-22eb-42f4-855d-e99ff15ecf64" xlink:to="loc_us-gaap_AccountsPayableCurrent_001aa9a4-cb84-482e-86b7-ec8c9f2c9131" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_59e6ec9a-431b-417f-ab50-e181132c87c0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f89973c-22eb-42f4-855d-e99ff15ecf64" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_59e6ec9a-431b-417f-ab50-e181132c87c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_bc50b259-6c2f-4b85-aec7-f8115bfe28b8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f89973c-22eb-42f4-855d-e99ff15ecf64" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_bc50b259-6c2f-4b85-aec7-f8115bfe28b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_00716f5f-ae51-433e-86ea-7ce8cfb3aa06" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f89973c-22eb-42f4-855d-e99ff15ecf64" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_00716f5f-ae51-433e-86ea-7ce8cfb3aa06" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_5cf264a2-99d7-4249-b70a-a8ab8142f0bc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f89973c-22eb-42f4-855d-e99ff15ecf64" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_5cf264a2-99d7-4249-b70a-a8ab8142f0bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_82dc0a84-3cad-4a95-a560-4e73669ff5c2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_a47053bc-418d-4041-8732-2f695764b8cb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_82dc0a84-3cad-4a95-a560-4e73669ff5c2" xlink:to="loc_us-gaap_CommonStockValue_a47053bc-418d-4041-8732-2f695764b8cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_4f463b6d-0ed5-4de2-8533-c5d349492e39" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_82dc0a84-3cad-4a95-a560-4e73669ff5c2" xlink:to="loc_us-gaap_AdditionalPaidInCapital_4f463b6d-0ed5-4de2-8533-c5d349492e39" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_fa145ed3-9c30-4144-af85-4bec6ed86b14" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_82dc0a84-3cad-4a95-a560-4e73669ff5c2" xlink:to="loc_us-gaap_TreasuryStockValue_fa145ed3-9c30-4144-af85-4bec6ed86b14" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_957a1379-9fd6-4513-8659-c630172ee4e9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_82dc0a84-3cad-4a95-a560-4e73669ff5c2" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_957a1379-9fd6-4513-8659-c630172ee4e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_07d3970d-7747-4284-9b92-fe02b2ab2a9c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_82dc0a84-3cad-4a95-a560-4e73669ff5c2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_07d3970d-7747-4284-9b92-fe02b2ab2a9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_31eccc30-9802-4949-a652-d7ba2bad52e3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_20cafcb0-d6e4-40e7-b1e9-2b5012fb30a2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_31eccc30-9802-4949-a652-d7ba2bad52e3" xlink:to="loc_us-gaap_LiabilitiesCurrent_20cafcb0-d6e4-40e7-b1e9-2b5012fb30a2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_3aef60dd-19e1-4741-9ff1-9dcd3b7b2e12" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_31eccc30-9802-4949-a652-d7ba2bad52e3" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_3aef60dd-19e1-4741-9ff1-9dcd3b7b2e12" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_a5256ff9-e12d-4ebd-920c-276684128365" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_31eccc30-9802-4949-a652-d7ba2bad52e3" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_a5256ff9-e12d-4ebd-920c-276684128365" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_1f165205-0343-4c5a-8fcd-a517f340b1e1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_31eccc30-9802-4949-a652-d7ba2bad52e3" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_1f165205-0343-4c5a-8fcd-a517f340b1e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtNoncurrent_4ce761a8-a5dd-4745-b258-02fd8218c2aa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConvertibleDebtNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_31eccc30-9802-4949-a652-d7ba2bad52e3" xlink:to="loc_us-gaap_ConvertibleDebtNoncurrent_4ce761a8-a5dd-4745-b258-02fd8218c2aa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_71917984-3709-4f01-b793-56732ac41acc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_31eccc30-9802-4949-a652-d7ba2bad52e3" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_71917984-3709-4f01-b793-56732ac41acc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_70cc2096-2872-433f-9a1f-600425f809ae" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_92fbc475-134f-4206-af86-5e38601e8b40" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_70cc2096-2872-433f-9a1f-600425f809ae" xlink:to="loc_us-gaap_AssetsCurrent_92fbc475-134f-4206-af86-5e38601e8b40" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_eca16722-18ce-46f3-a182-5c6ef7d64f26" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_70cc2096-2872-433f-9a1f-600425f809ae" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_eca16722-18ce-46f3-a182-5c6ef7d64f26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_f1de685c-1975-4731-a10d-8c66829f9120" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_70cc2096-2872-433f-9a1f-600425f809ae" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_f1de685c-1975-4731-a10d-8c66829f9120" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_a35a070c-468b-4f22-b358-3c563c874de7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_70cc2096-2872-433f-9a1f-600425f809ae" xlink:to="loc_us-gaap_Goodwill_a35a070c-468b-4f22-b358-3c563c874de7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4e32719a-522e-44e5-8efd-3acece71de0b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_70cc2096-2872-433f-9a1f-600425f809ae" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4e32719a-522e-44e5-8efd-3acece71de0b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_71562045-870c-4cd5-8d28-a001c8104d2d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_70cc2096-2872-433f-9a1f-600425f809ae" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_71562045-870c-4cd5-8d28-a001c8104d2d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_f30abf54-e08b-4133-9be6-7ce7191a1116" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_70cc2096-2872-433f-9a1f-600425f809ae" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_f30abf54-e08b-4133-9be6-7ce7191a1116" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="mdb-20210131.xsd#CONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="mdb-20210131.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_d8f6cdf5-4d94-45bd-93d0-cdd8bc5aeb68" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_eec5df3a-fdd7-499b-bd96-2b9586d8ddd7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_d8f6cdf5-4d94-45bd-93d0-cdd8bc5aeb68" xlink:to="loc_us-gaap_SellingAndMarketingExpense_eec5df3a-fdd7-499b-bd96-2b9586d8ddd7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_a722b15d-7f2d-48ab-8754-ce4409007bd2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_d8f6cdf5-4d94-45bd-93d0-cdd8bc5aeb68" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_a722b15d-7f2d-48ab-8754-ce4409007bd2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_412a7287-ddfe-4799-9496-778eb5055c87" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_d8f6cdf5-4d94-45bd-93d0-cdd8bc5aeb68" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_412a7287-ddfe-4799-9496-778eb5055c87" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_5eec4667-9631-47fd-911f-7f73f5c18c25" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2c1bba4b-cb33-4955-90b9-e7fa2a0a70f5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_5eec4667-9631-47fd-911f-7f73f5c18c25" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2c1bba4b-cb33-4955-90b9-e7fa2a0a70f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_75cdaf72-c4cd-4ac9-a1d6-4adad2b8417f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_5eec4667-9631-47fd-911f-7f73f5c18c25" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_75cdaf72-c4cd-4ac9-a1d6-4adad2b8417f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_0586ef19-3367-40aa-b8e3-c7492f920083" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_d30a5a6c-2f56-4c95-bb43-29e12f6807b3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_0586ef19-3367-40aa-b8e3-c7492f920083" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_d30a5a6c-2f56-4c95-bb43-29e12f6807b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0d37e3f1-2639-4b06-9b35-da15eaee22be" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_0586ef19-3367-40aa-b8e3-c7492f920083" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0d37e3f1-2639-4b06-9b35-da15eaee22be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_14a1601e-afe2-4440-b59d-cf2db6c35bcb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_ff1cf480-6d25-425d-ac84-2cee9f87835b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_14a1601e-afe2-4440-b59d-cf2db6c35bcb" xlink:to="loc_us-gaap_OperatingExpenses_ff1cf480-6d25-425d-ac84-2cee9f87835b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_afe5e9c4-8265-41f2-beb2-a564de95cd25" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_14a1601e-afe2-4440-b59d-cf2db6c35bcb" xlink:to="loc_us-gaap_GrossProfit_afe5e9c4-8265-41f2-beb2-a564de95cd25" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_27748e8c-b6c7-4bf0-8a9d-a7c566445f66" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_122d738a-7d9f-49de-a091-3b6fe61299fa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_27748e8c-b6c7-4bf0-8a9d-a7c566445f66" xlink:to="loc_us-gaap_OperatingIncomeLoss_122d738a-7d9f-49de-a091-3b6fe61299fa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeNet_127cb7be-4163-4bc7-8ecf-6ad945ab20ef" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentIncomeNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_27748e8c-b6c7-4bf0-8a9d-a7c566445f66" xlink:to="loc_us-gaap_InvestmentIncomeNet_127cb7be-4163-4bc7-8ecf-6ad945ab20ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_848f3e29-e10d-4611-a24b-b897d1b1f104" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_27748e8c-b6c7-4bf0-8a9d-a7c566445f66" xlink:to="loc_us-gaap_InterestExpense_848f3e29-e10d-4611-a24b-b897d1b1f104" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_a5bda191-fc23-4fb2-a48a-9f1319f8387c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_27748e8c-b6c7-4bf0-8a9d-a7c566445f66" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_a5bda191-fc23-4fb2-a48a-9f1319f8387c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" xlink:type="simple" xlink:href="mdb-20210131.xsd#CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_5cef30cb-d179-4424-954d-f497f233f321" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_c27dca13-6675-4cbb-9430-97b82b107271" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_5cef30cb-d179-4424-954d-f497f233f321" xlink:to="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_c27dca13-6675-4cbb-9430-97b82b107271" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_b855c2ac-87da-44e8-b7b4-5b6a1ed10da7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_5cef30cb-d179-4424-954d-f497f233f321" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_b855c2ac-87da-44e8-b7b4-5b6a1ed10da7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_25eb5bc4-27d6-4777-91e5-094cc57586a5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_60395027-914e-45d1-9c13-059ea899f76a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_25eb5bc4-27d6-4777-91e5-094cc57586a5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_60395027-914e-45d1-9c13-059ea899f76a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_e881a8b8-84b5-4187-9606-b1bb3cd68191" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_25eb5bc4-27d6-4777-91e5-094cc57586a5" xlink:to="loc_us-gaap_NetIncomeLoss_e881a8b8-84b5-4187-9606-b1bb3cd68191" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICIT" xlink:type="simple" xlink:href="mdb-20210131.xsd#CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICIT"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICIT" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="mdb-20210131.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3a672a2e-46ee-4417-8a20-988399da750d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0729e33e-dc15-4a92-b74c-58da65977210" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3a672a2e-46ee-4417-8a20-988399da750d" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0729e33e-dc15-4a92-b74c-58da65977210" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a1f37408-3f09-4e82-80c8-0bf8d9adeb63" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3a672a2e-46ee-4417-8a20-988399da750d" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a1f37408-3f09-4e82-80c8-0bf8d9adeb63" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2737b548-8b9d-49b8-86e6-62c37934d05c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3a672a2e-46ee-4417-8a20-988399da750d" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2737b548-8b9d-49b8-86e6-62c37934d05c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_f6654deb-c5a0-496e-9e9e-9bda3131f081" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3a672a2e-46ee-4417-8a20-988399da750d" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_f6654deb-c5a0-496e-9e9e-9bda3131f081" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_PaymentsForPurchaseOfCappedCalls_d999e923-f924-44a0-a917-8d1f0583bb90" xlink:href="mdb-20210131.xsd#mdb_PaymentsForPurchaseOfCappedCalls"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_mdb_PaymentsForPurchaseOfCappedCalls_d999e923-f924-44a0-a917-8d1f0583bb90" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_2847e2b4-e857-444f-b8e7-c12dfad4159d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_2847e2b4-e857-444f-b8e7-c12dfad4159d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_e3129187-212c-4b35-910c-1b34d1e4d847" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_e3129187-212c-4b35-910c-1b34d1e4d847" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_cd576187-44de-46f4-9d5f-cfb628c6e550" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_cd576187-44de-46f4-9d5f-cfb628c6e550" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_be0ffb59-adf3-48dc-8bcd-80a2e071e7f1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_be0ffb59-adf3-48dc-8bcd-80a2e071e7f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_3f9e8493-c1f7-4e0f-b79b-adf9987926d2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDebtExtinguishmentCosts"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_3f9e8493-c1f7-4e0f-b79b-adf9987926d2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_cf78b91a-32b4-489a-91cd-fe7f154ea655" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeasePrincipalPayments"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_us-gaap_FinanceLeasePrincipalPayments_cf78b91a-32b4-489a-91cd-fe7f154ea655" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_ProceedsFromTenantAllowance_2972efc2-ea0b-4fe9-b2f3-4b2907ccc422" xlink:href="mdb-20210131.xsd#mdb_ProceedsFromTenantAllowance"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_mdb_ProceedsFromTenantAllowance_2972efc2-ea0b-4fe9-b2f3-4b2907ccc422" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_700c844c-3d69-4f54-83fd-66f486aa2672" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_12570ccb-d33d-4908-8161-a0b912169ede" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_700c844c-3d69-4f54-83fd-66f486aa2672" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a21ccbe6-197c-4206-967c-b44571bc7e65" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_e076d6d1-358a-4714-ae7e-39f5597c5a15" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a21ccbe6-197c-4206-967c-b44571bc7e65" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_e076d6d1-358a-4714-ae7e-39f5597c5a15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_ba0f2993-a3ad-4583-999f-f20dc1a33d60" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireMarketableSecurities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a21ccbe6-197c-4206-967c-b44571bc7e65" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_ba0f2993-a3ad-4583-999f-f20dc1a33d60" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_ad9b5b38-58c4-46df-89ca-c62ce2faa989" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a21ccbe6-197c-4206-967c-b44571bc7e65" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_ad9b5b38-58c4-46df-89ca-c62ce2faa989" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_36abcca5-461a-4a76-a605-0ca3c5a6bceb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a21ccbe6-197c-4206-967c-b44571bc7e65" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_36abcca5-461a-4a76-a605-0ca3c5a6bceb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_PaymentsToAcquireNonMarketableSecurities_54e9842c-17c7-4543-a4db-deb460d78110" xlink:href="mdb-20210131.xsd#mdb_PaymentsToAcquireNonMarketableSecurities"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a21ccbe6-197c-4206-967c-b44571bc7e65" xlink:to="loc_mdb_PaymentsToAcquireNonMarketableSecurities_54e9842c-17c7-4543-a4db-deb460d78110" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_40a5b9f4-c62e-4f4c-ba69-781c4f2b144a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_40a5b9f4-c62e-4f4c-ba69-781c4f2b144a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_NonCashInterestOnBuildToSuitLease_b2172719-59c3-41d7-b3b9-68653aab8ea1" xlink:href="mdb-20210131.xsd#mdb_NonCashInterestOnBuildToSuitLease"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_mdb_NonCashInterestOnBuildToSuitLease_b2172719-59c3-41d7-b3b9-68653aab8ea1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_dc8667e4-cf6c-412d-9b98-446ea125f830" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_dc8667e4-cf6c-412d-9b98-446ea125f830" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_b70ceaa1-dda4-4267-be4f-c5a5f50c716c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_b70ceaa1-dda4-4267-be4f-c5a5f50c716c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_a5d9b13c-fbbd-41d2-b8c0-136bf2936f8a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_a5d9b13c-fbbd-41d2-b8c0-136bf2936f8a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_abef2e06-955a-49dc-b26c-9086095516d7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_abef2e06-955a-49dc-b26c-9086095516d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_f290a69f-bf06-4ee3-a657-25d2042d90db" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_f290a69f-bf06-4ee3-a657-25d2042d90db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredCharges_3a52abd6-970b-42c1-8cd8-39f6b639b87a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredCharges"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredCharges_3a52abd6-970b-42c1-8cd8-39f6b639b87a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_c1bc8acb-7c90-476d-858e-8e2f22bfcb27" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_c1bc8acb-7c90-476d-858e-8e2f22bfcb27" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_a7cfcfe7-bcd1-4a49-9c3f-3a9112538d92" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_a7cfcfe7-bcd1-4a49-9c3f-3a9112538d92" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_37eae230-8b69-4a89-946c-4de30e284e09" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_37eae230-8b69-4a89-946c-4de30e284e09" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_ce7d0e2e-aa22-4232-8f18-4d62e9e82ebe" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_ce7d0e2e-aa22-4232-8f18-4d62e9e82ebe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_IncreaseDecreaseInOperatingLeaseLiability_205c4c7a-1256-4d7b-bc9e-0f147101dda9" xlink:href="mdb-20210131.xsd#mdb_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_mdb_IncreaseDecreaseInOperatingLeaseLiability_205c4c7a-1256-4d7b-bc9e-0f147101dda9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_OperatingLeaseRightofUseAssetAmortization_a47f9de8-d3f2-47b8-ba9f-139f077870fc" xlink:href="mdb-20210131.xsd#mdb_OperatingLeaseRightofUseAssetAmortization"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_mdb_OperatingLeaseRightofUseAssetAmortization_a47f9de8-d3f2-47b8-ba9f-139f077870fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_8715fcc3-4dc3-4396-b7e2-2af90181604f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_NetIncomeLoss_8715fcc3-4dc3-4396-b7e2-2af90181604f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredLiabilities_910fbac2-f46f-4481-93a7-4d80960d609a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredLiabilities"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredLiabilities_910fbac2-f46f-4481-93a7-4d80960d609a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_8d8822ae-c791-4da0-8d13-fb9581404a4d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_8d8822ae-c791-4da0-8d13-fb9581404a4d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_a7a71fde-1274-474e-80e4-8d0845125c65" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_a7a71fde-1274-474e-80e4-8d0845125c65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_e9a3735e-99cf-40c7-8eb0-4732d57d52d3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:calculationArc order="19" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_e9a3735e-99cf-40c7-8eb0-4732d57d52d3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_11534a6d-1b51-40a9-a601-e96dff1303fc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="20" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_ShareBasedCompensation_11534a6d-1b51-40a9-a601-e96dff1303fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_27ce4ed1-4ae2-43da-866b-50e1c236b966" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="21" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2e3599e5-9c2d-43b9-abca-94f01b25f7de" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_27ce4ed1-4ae2-43da-866b-50e1c236b966" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSReconciliation" xlink:type="simple" xlink:href="mdb-20210131.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWSReconciliation"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSReconciliation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_c10cf24a-7424-4a0c-85f6-15e11c86b961" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4cd5b3fd-18e6-4829-8720-8ef9dc41a264" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_c10cf24a-7424-4a0c-85f6-15e11c86b961" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4cd5b3fd-18e6-4829-8720-8ef9dc41a264" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_aa829a9d-902a-44c6-ac8c-88833c433afd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_c10cf24a-7424-4a0c-85f6-15e11c86b961" xlink:to="loc_us-gaap_RestrictedCashCurrent_aa829a9d-902a-44c6-ac8c-88833c433afd" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/OrganizationandDescriptionofBusiness" xlink:type="simple" xlink:href="mdb-20210131.xsd#OrganizationandDescriptionofBusiness"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/OrganizationandDescriptionofBusiness" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPolicies"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesPolicies"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesMarketableSecuritiesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesMarketableSecuritiesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesMarketableSecuritiesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesRestrictedCashDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesRestrictedCashDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesRestrictedCashDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesCapitalizedSoftwareCostsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesCapitalizedSoftwareCostsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesCapitalizedSoftwareCostsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesScheduleofPropertyPlantandEquipmentUsefulLivesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesScheduleofPropertyPlantandEquipmentUsefulLivesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesScheduleofPropertyPlantandEquipmentUsefulLivesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesLongLivedAssetsIncludingGoodwillandOtherAcquiredIntangibleAssetsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesLongLivedAssetsIncludingGoodwillandOtherAcquiredIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesLongLivedAssetsIncludingGoodwillandOtherAcquiredIntangibleAssetsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesAdvertisingDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesAdvertisingDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesAdvertisingDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesStockBasedCompensationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesSegmentInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesSegmentInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesSegmentInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesRelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesRelatedPartyTransactionsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesRelatedPartyTransactionsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesRecentlyAdoptedAccountingPronouncementsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#SummaryofSignificantAccountingPoliciesRecentlyAdoptedAccountingPronouncementsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/SummaryofSignificantAccountingPoliciesRecentlyAdoptedAccountingPronouncementsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="mdb-20210131.xsd#FairValueMeasurements"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/FairValueMeasurements" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/FairValueMeasurementsTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#FairValueMeasurementsTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/FairValueMeasurementsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/FairValueMeasurementsScheduleofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#FairValueMeasurementsScheduleofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/FairValueMeasurementsScheduleofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_bc7169f0-4206-4f16-9dc8-c88dcc591dc3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_7831b706-fddf-4e7c-a372-9bc502cd3a5e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_bc7169f0-4206-4f16-9dc8-c88dcc591dc3" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_7831b706-fddf-4e7c-a372-9bc502cd3a5e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_73950ead-1c65-4248-bdf2-a81eae4cb5bf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_bc7169f0-4206-4f16-9dc8-c88dcc591dc3" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_73950ead-1c65-4248-bdf2-a81eae4cb5bf" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#FairValueMeasurementsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/PropertyandEquipmentNet" xlink:type="simple" xlink:href="mdb-20210131.xsd#PropertyandEquipmentNet"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/PropertyandEquipmentNet" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/PropertyandEquipmentNetTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#PropertyandEquipmentNetTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/PropertyandEquipmentNetTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/PropertyandEquipmentNetScheduleDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#PropertyandEquipmentNetScheduleDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/PropertyandEquipmentNetScheduleDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_5676cb9e-d8af-4fee-8c6b-e82aa9cd390f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_a414080a-75c7-4d5f-8ba7-c869f0fad6a5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_5676cb9e-d8af-4fee-8c6b-e82aa9cd390f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_a414080a-75c7-4d5f-8ba7-c869f0fad6a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4fa7cc36-c222-435c-a5d3-7ac3dc6774ac" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_5676cb9e-d8af-4fee-8c6b-e82aa9cd390f" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4fa7cc36-c222-435c-a5d3-7ac3dc6774ac" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/PropertyandEquipmentNetAdditionalInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#PropertyandEquipmentNetAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/PropertyandEquipmentNetAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNet" xlink:type="simple" xlink:href="mdb-20210131.xsd#GoodwillandAcquiredIntangibleAssetsNet"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNet" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#GoodwillandAcquiredIntangibleAssetsNetTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetScheduleofGoodwillDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#GoodwillandAcquiredIntangibleAssetsNetScheduleofGoodwillDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetScheduleofGoodwillDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetScheduleofIntangibleAssetsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#GoodwillandAcquiredIntangibleAssetsNetScheduleofIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetScheduleofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_2b68e322-420e-4075-8864-3890773106a3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_7892a88d-dbbd-49a5-8f58-b47fcc254a94" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_2b68e322-420e-4075-8864-3890773106a3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_7892a88d-dbbd-49a5-8f58-b47fcc254a94" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_f75b59f9-06d2-4fd4-a48b-fdba32a67728" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_2b68e322-420e-4075-8864-3890773106a3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_f75b59f9-06d2-4fd4-a48b-fdba32a67728" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetAdditionalInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#GoodwillandAcquiredIntangibleAssetsNetAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetFutureAmortizationExpenseDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#GoodwillandAcquiredIntangibleAssetsNetFutureAmortizationExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/GoodwillandAcquiredIntangibleAssetsNetFutureAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_433a3e99-6ae9-4c5e-bdd2-0afbaccee1d3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_91487dca-c9f5-4436-b03a-30bacf591c01" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_433a3e99-6ae9-4c5e-bdd2-0afbaccee1d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_91487dca-c9f5-4436-b03a-30bacf591c01" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_9da3fd1d-2370-4d61-b06b-fdf6fc7a1333" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_433a3e99-6ae9-4c5e-bdd2-0afbaccee1d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_9da3fd1d-2370-4d61-b06b-fdf6fc7a1333" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_95924a85-1ccd-4c3b-b591-e4a6c3525ef0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_433a3e99-6ae9-4c5e-bdd2-0afbaccee1d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_95924a85-1ccd-4c3b-b591-e4a6c3525ef0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5196c33c-c15c-430f-8610-1ec1fdcc222b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_433a3e99-6ae9-4c5e-bdd2-0afbaccee1d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5196c33c-c15c-430f-8610-1ec1fdcc222b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_5f1baca2-10a9-4577-8eee-dcde3584007b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_433a3e99-6ae9-4c5e-bdd2-0afbaccee1d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_5f1baca2-10a9-4577-8eee-dcde3584007b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/ConvertibleSeniorNotes" xlink:type="simple" xlink:href="mdb-20210131.xsd#ConvertibleSeniorNotes"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/ConvertibleSeniorNotes" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/ConvertibleSeniorNotesTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#ConvertibleSeniorNotesTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/ConvertibleSeniorNotesTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/ConvertibleSeniorNotesAdditionalInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#ConvertibleSeniorNotesAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/ConvertibleSeniorNotesAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/ConvertibleSeniorNotesScheduleofNetCarryingAmountoftheLiabilityComponentoftheNotesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#ConvertibleSeniorNotesScheduleofNetCarryingAmountoftheLiabilityComponentoftheNotesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/ConvertibleSeniorNotesScheduleofNetCarryingAmountoftheLiabilityComponentoftheNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_e4afbbcc-7924-4e36-9df3-ac1cb4f3753a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_10cc40f8-de56-4501-bb6d-cd40a23745da" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_e4afbbcc-7924-4e36-9df3-ac1cb4f3753a" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_10cc40f8-de56-4501-bb6d-cd40a23745da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_e31399cf-6070-4794-9a39-138a2131a0a1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_e4afbbcc-7924-4e36-9df3-ac1cb4f3753a" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_e31399cf-6070-4794-9a39-138a2131a0a1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_ad24d42a-4894-4ccd-969e-751bda4bdf6a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_e4afbbcc-7924-4e36-9df3-ac1cb4f3753a" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_ad24d42a-4894-4ccd-969e-751bda4bdf6a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/ConvertibleSeniorNotesScheduleofInterestExpensefortheNotesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#ConvertibleSeniorNotesScheduleofInterestExpensefortheNotesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/ConvertibleSeniorNotesScheduleofInterestExpensefortheNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_9a9e17b4-50c6-40f4-9f58-251684953174" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpenseDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebtExcludingAmortization_6128ce7a-a074-4b3a-af44-afa65cdf69b3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpenseDebtExcludingAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseDebt_9a9e17b4-50c6-40f4-9f58-251684953174" xlink:to="loc_us-gaap_InterestExpenseDebtExcludingAmortization_6128ce7a-a074-4b3a-af44-afa65cdf69b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfDebtDiscountPremium_718582ed-a177-4e27-9d72-1218a1592f84" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseDebt_9a9e17b4-50c6-40f4-9f58-251684953174" xlink:to="loc_us-gaap_AmortizationOfDebtDiscountPremium_718582ed-a177-4e27-9d72-1218a1592f84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_a0fbcdf1-cc12-4cad-8445-c8e2779a3a03" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseDebt_9a9e17b4-50c6-40f4-9f58-251684953174" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_a0fbcdf1-cc12-4cad-8445-c8e2779a3a03" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/ConvertibleSeniorNotesCappedCallsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#ConvertibleSeniorNotesCappedCallsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/ConvertibleSeniorNotesCappedCallsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/Leases" xlink:type="simple" xlink:href="mdb-20210131.xsd#Leases"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/Leases" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/LeasesTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#LeasesTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/LeasesTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#LeasesNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/LeasesNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/LeasesComponentsofLeaseExpenseDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#LeasesComponentsofLeaseExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/LeasesComponentsofLeaseExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_8c2d99fa-77b1-42e5-8cb7-5dae6c13f9aa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_3f21fbef-3b75-4c39-9f45-84686e980fe4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_8c2d99fa-77b1-42e5-8cb7-5dae6c13f9aa" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_3f21fbef-3b75-4c39-9f45-84686e980fe4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_FinanceLeaseInterestOnLeaseLiability_0afe8d97-bdcb-42d5-8534-9f59d11fc031" xlink:href="mdb-20210131.xsd#mdb_FinanceLeaseInterestOnLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_8c2d99fa-77b1-42e5-8cb7-5dae6c13f9aa" xlink:to="loc_mdb_FinanceLeaseInterestOnLeaseLiability_0afe8d97-bdcb-42d5-8534-9f59d11fc031" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_64a3f730-1b01-42cb-a949-5d8bc5e981fe" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_8c2d99fa-77b1-42e5-8cb7-5dae6c13f9aa" xlink:to="loc_us-gaap_OperatingLeaseCost_64a3f730-1b01-42cb-a949-5d8bc5e981fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_19acd1ef-afb7-4b06-9855-6946b7faac21" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_8c2d99fa-77b1-42e5-8cb7-5dae6c13f9aa" xlink:to="loc_us-gaap_ShortTermLeaseCost_19acd1ef-afb7-4b06-9855-6946b7faac21" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/LeasesBalanceSheetComponentsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#LeasesBalanceSheetComponentsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/LeasesBalanceSheetComponentsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/LeasesSupplementalInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#LeasesSupplementalInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/LeasesSupplementalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/LeasesLeaseMaturitiesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#LeasesLeaseMaturitiesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/LeasesLeaseMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_bc326147-f566-4f05-b019-d492947205cf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_a23d32f2-b9d4-46a6-a8dd-8b5e1ef53635" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_bc326147-f566-4f05-b019-d492947205cf" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_a23d32f2-b9d4-46a6-a8dd-8b5e1ef53635" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_50b62c0b-8b06-4599-b62a-82c2a87ad1d2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_bc326147-f566-4f05-b019-d492947205cf" xlink:to="loc_us-gaap_OperatingLeaseLiability_50b62c0b-8b06-4599-b62a-82c2a87ad1d2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_90a1d1aa-6ab1-4f65-a209-f2953b8cc1b2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_51d56544-d1ea-4819-88b4-78f3e79d2445" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_90a1d1aa-6ab1-4f65-a209-f2953b8cc1b2" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_51d56544-d1ea-4819-88b4-78f3e79d2445" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_dca20fad-bfd8-4aa4-b5d5-19c04b219474" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_90a1d1aa-6ab1-4f65-a209-f2953b8cc1b2" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_dca20fad-bfd8-4aa4-b5d5-19c04b219474" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_13638ed6-5a79-4e27-a599-6e4e0964a3d9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_90a1d1aa-6ab1-4f65-a209-f2953b8cc1b2" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_13638ed6-5a79-4e27-a599-6e4e0964a3d9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_697ac65c-466a-4f62-9a33-2ec730e7556e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_90a1d1aa-6ab1-4f65-a209-f2953b8cc1b2" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_697ac65c-466a-4f62-9a33-2ec730e7556e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_620b05f5-eeab-4048-9a61-1451575e9f25" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_90a1d1aa-6ab1-4f65-a209-f2953b8cc1b2" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_620b05f5-eeab-4048-9a61-1451575e9f25" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_aede7697-76a3-43ee-9b69-d48c6ab83938" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_90a1d1aa-6ab1-4f65-a209-f2953b8cc1b2" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_aede7697-76a3-43ee-9b69-d48c6ab83938" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_cadf5df2-4f46-44e1-92c4-9f76ea54352e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_0b472041-0e7a-4608-8552-2539ea5992b0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeaseLiability_cadf5df2-4f46-44e1-92c4-9f76ea54352e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_0b472041-0e7a-4608-8552-2539ea5992b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_5b6bba65-d053-45fb-8761-484e7cfc3802" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeaseLiability_cadf5df2-4f46-44e1-92c4-9f76ea54352e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_5b6bba65-d053-45fb-8761-484e7cfc3802" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_404f11d6-ec2e-4d1c-b5f0-2d3d4e861097" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_8018665f-4baa-4250-b7e4-c475d15ac674" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiability_404f11d6-ec2e-4d1c-b5f0-2d3d4e861097" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_8018665f-4baa-4250-b7e4-c475d15ac674" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_e10903f7-6603-44d8-a40b-7c897cbb685e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiability_404f11d6-ec2e-4d1c-b5f0-2d3d4e861097" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_e10903f7-6603-44d8-a40b-7c897cbb685e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/CommitmentsandContingencies" xlink:type="simple" xlink:href="mdb-20210131.xsd#CommitmentsandContingencies"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CommitmentsandContingencies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/CommitmentsandContingenciesTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#CommitmentsandContingenciesTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CommitmentsandContingenciesTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/CommitmentsandContingenciesFutureMinimumFinancingandOperatingLeasesandOtherNonCancellableAgreementsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#CommitmentsandContingenciesFutureMinimumFinancingandOperatingLeasesandOtherNonCancellableAgreementsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CommitmentsandContingenciesFutureMinimumFinancingandOperatingLeasesandOtherNonCancellableAgreementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitment_2f06f5b3-be3f-41bd-9547-d1f10f33f323" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_dea4e2ac-83b1-47df-8e89-1300c45049d9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_2f06f5b3-be3f-41bd-9547-d1f10f33f323" xlink:to="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_dea4e2ac-83b1-47df-8e89-1300c45049d9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentDueInSecondYear_855e4013-96a9-4d10-9c0e-c8c6230a28fa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInSecondYear"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_2f06f5b3-be3f-41bd-9547-d1f10f33f323" xlink:to="loc_us-gaap_OtherCommitmentDueInSecondYear_855e4013-96a9-4d10-9c0e-c8c6230a28fa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentDueInThirdYear_c8041d11-bbb0-4cf3-8c8d-61a6fbeab53c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInThirdYear"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_2f06f5b3-be3f-41bd-9547-d1f10f33f323" xlink:to="loc_us-gaap_OtherCommitmentDueInThirdYear_c8041d11-bbb0-4cf3-8c8d-61a6fbeab53c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentDueInFourthYear_001d6715-4b18-44ba-8ba9-ff1e55559d84" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInFourthYear"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_2f06f5b3-be3f-41bd-9547-d1f10f33f323" xlink:to="loc_us-gaap_OtherCommitmentDueInFourthYear_001d6715-4b18-44ba-8ba9-ff1e55559d84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentDueInFifthYear_61a4ca9f-ac7f-4ed5-9e8e-c97895529f78" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInFifthYear"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_2f06f5b3-be3f-41bd-9547-d1f10f33f323" xlink:to="loc_us-gaap_OtherCommitmentDueInFifthYear_61a4ca9f-ac7f-4ed5-9e8e-c97895529f78" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentDueAfterFifthYear_edb71ab7-bb4c-4e32-b145-9815e012c555" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueAfterFifthYear"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_2f06f5b3-be3f-41bd-9547-d1f10f33f323" xlink:to="loc_us-gaap_OtherCommitmentDueAfterFifthYear_edb71ab7-bb4c-4e32-b145-9815e012c555" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/CommitmentsandContingenciesAdditionalInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#CommitmentsandContingenciesAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/CommitmentsandContingenciesAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/StockholdersEquityDeficit" xlink:type="simple" xlink:href="mdb-20210131.xsd#StockholdersEquityDeficit"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/StockholdersEquityDeficit" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/StockholdersEquityDeficitDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#StockholdersEquityDeficitDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/StockholdersEquityDeficitDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/Revenue" xlink:type="simple" xlink:href="mdb-20210131.xsd#Revenue"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/Revenue" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueScheduleofDisaggregationofRevenueDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueScheduleofDisaggregationofRevenueDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueDisaggregationofRevenueDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueContractLiabilitiesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueContractLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueContractLiabilitiesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueRemainingPerformanceObligationsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueRemainingPerformanceObligationsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueRemainingPerformanceObligationsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueRemainingPerformanceObligationsDetails_1" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueRemainingPerformanceObligationsDetails_1"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueRemainingPerformanceObligationsDetails_1" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueUnbilledReceivablesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueUnbilledReceivablesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueUnbilledReceivablesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueAllowanceforDoubtfulAccountsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueAllowanceforDoubtfulAccountsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueAllowanceforDoubtfulAccountsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/RevenueCostsCapitalizedtoObtainContractswithCustomersDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#RevenueCostsCapitalizedtoObtainContractswithCustomersDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/RevenueCostsCapitalizedtoObtainContractswithCustomersDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlans" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlans"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlans" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlansTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlansTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlansTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlans2008and2016StockPlanDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlans2008and2016StockPlanDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlans2008and2016StockPlanDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlansScheduleofStockOptionActivityDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlansScheduleofStockOptionActivityDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlansScheduleofStockOptionActivityDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlansStockOptionsandRestrictedStockUnitsAdditionalInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlansStockOptionsandRestrictedStockUnitsAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlansStockOptionsandRestrictedStockUnitsAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlansScheduleofRSUActivityDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlansScheduleofRSUActivityDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlansScheduleofRSUActivityDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlans2016ChinaStockAppreciationRightsPlanDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlans2016ChinaStockAppreciationRightsPlanDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlans2016ChinaStockAppreciationRightsPlanDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlans2017EmployeeStockPurchasePlanDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlans2017EmployeeStockPurchasePlanDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlans2017EmployeeStockPurchasePlanDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlansStockOptionRepricingDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlansStockOptionRepricingDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlansStockOptionRepricingDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlansEarlyExerciseofStockOptionsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlansEarlyExerciseofStockOptionsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlansEarlyExerciseofStockOptionsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlansScheduleofESPPValuationAssumptionsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlansScheduleofESPPValuationAssumptionsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlansScheduleofESPPValuationAssumptionsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/EquityIncentivePlansStockbasedCompensationExpenseRecognizedinStatementofOperationsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#EquityIncentivePlansStockbasedCompensationExpenseRecognizedinStatementofOperationsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/EquityIncentivePlansStockbasedCompensationExpenseRecognizedinStatementofOperationsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/NetLossPerShare" xlink:type="simple" xlink:href="mdb-20210131.xsd#NetLossPerShare"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/NetLossPerShare" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/NetLossPerShareTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#NetLossPerShareTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/NetLossPerShareTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/NetLossPerShareAdditionalInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#NetLossPerShareAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/NetLossPerShareAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/NetLossPerShareScheduleofBasicandDilutedEarningsLossPerShareDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#NetLossPerShareScheduleofBasicandDilutedEarningsLossPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/NetLossPerShareScheduleofBasicandDilutedEarningsLossPerShareDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/NetLossPerShareScheduleofAntidilutiveSecuritiesExcludedfromtheComputationofDilutedNetlosspershareDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#NetLossPerShareScheduleofAntidilutiveSecuritiesExcludedfromtheComputationofDilutedNetlosspershareDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/NetLossPerShareScheduleofAntidilutiveSecuritiesExcludedfromtheComputationofDilutedNetlosspershareDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/IncomeTaxes" xlink:type="simple" xlink:href="mdb-20210131.xsd#IncomeTaxes"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/IncomeTaxes" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/IncomeTaxesTables" xlink:type="simple" xlink:href="mdb-20210131.xsd#IncomeTaxesTables"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/IncomeTaxesTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/IncomeTaxesScheduleofComponentsofLossBeforeProvisionforIncomeTaxesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#IncomeTaxesScheduleofComponentsofLossBeforeProvisionforIncomeTaxesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/IncomeTaxesScheduleofComponentsofLossBeforeProvisionforIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_879222ac-7ee6-422d-9b96-810e98a75a18" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_fb7f6fa7-2d7e-4486-9e2f-06a880517f07" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_879222ac-7ee6-422d-9b96-810e98a75a18" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_fb7f6fa7-2d7e-4486-9e2f-06a880517f07" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_f422ff46-bb78-4e23-8bd3-59fc000269f9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_879222ac-7ee6-422d-9b96-810e98a75a18" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_f422ff46-bb78-4e23-8bd3-59fc000269f9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/IncomeTaxesScheduleofComponentsofProvisionforIncomeTaxDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#IncomeTaxesScheduleofComponentsofProvisionforIncomeTaxDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/IncomeTaxesScheduleofComponentsofProvisionforIncomeTaxDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2def47ad-6d10-4f77-9e70-d9a2f533dfa0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_349bbef3-ce46-48f5-8458-d0424cab8980" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2def47ad-6d10-4f77-9e70-d9a2f533dfa0" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_349bbef3-ce46-48f5-8458-d0424cab8980" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_352dd6d8-5a1c-495c-afce-74a2523451f0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2def47ad-6d10-4f77-9e70-d9a2f533dfa0" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_352dd6d8-5a1c-495c-afce-74a2523451f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_9a389078-3bdb-4f9b-8b84-9889c5a238d4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2def47ad-6d10-4f77-9e70-d9a2f533dfa0" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_9a389078-3bdb-4f9b-8b84-9889c5a238d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_c16463a7-8735-4ad8-8a13-ab290ff9b0cc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_f3e030b8-22a2-4383-81fa-af2915ce5986" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_c16463a7-8735-4ad8-8a13-ab290ff9b0cc" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_f3e030b8-22a2-4383-81fa-af2915ce5986" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_fd2243f2-db78-4391-a6a0-6dd56297cdf3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_c16463a7-8735-4ad8-8a13-ab290ff9b0cc" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_fd2243f2-db78-4391-a6a0-6dd56297cdf3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0d3e3555-0aed-47f7-bf67-a30796d5f406" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_0462d5a6-b243-4cc7-91bc-a5d40fc05f93" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0d3e3555-0aed-47f7-bf67-a30796d5f406" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_0462d5a6-b243-4cc7-91bc-a5d40fc05f93" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_aa33e0a2-e536-47e0-9cd2-d910a0c5409c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0d3e3555-0aed-47f7-bf67-a30796d5f406" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_aa33e0a2-e536-47e0-9cd2-d910a0c5409c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_6590fe7b-bfda-4621-8357-3412bed37b31" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0d3e3555-0aed-47f7-bf67-a30796d5f406" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_6590fe7b-bfda-4621-8357-3412bed37b31" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/IncomeTaxesScheduleofEffectiveIncomeTaxRateDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#IncomeTaxesScheduleofEffectiveIncomeTaxRateDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/IncomeTaxesScheduleofEffectiveIncomeTaxRateDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_801791f2-d838-4b7c-964b-335e5ac58e21" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_801791f2-d838-4b7c-964b-335e5ac58e21" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsForeign_ef06c278-b454-4a82-8de1-0931fbc7bb96" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsForeign"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsForeign_ef06c278-b454-4a82-8de1-0931fbc7bb96" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_11f777ab-c698-46ee-b3ad-427445eeeee1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_11f777ab-c698-46ee-b3ad-427445eeeee1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_f81a62ce-d774-48da-9cbf-5ac807bbee8c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_f81a62ce-d774-48da-9cbf-5ac807bbee8c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_e1a9ed1f-8976-42cf-800d-c6d90486763e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_e1a9ed1f-8976-42cf-800d-c6d90486763e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_56757c89-9513-4821-9679-6b57a255cc49" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_56757c89-9513-4821-9679-6b57a255cc49" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_8ff931f2-0b97-4c07-bc60-cc21aa515c7e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_8ff931f2-0b97-4c07-bc60-cc21aa515c7e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_EffectiveIncomeTaxRateReconciliationForeignBranchIncome_48db832e-bde2-4318-9ddd-de33f7637f52" xlink:href="mdb-20210131.xsd#mdb_EffectiveIncomeTaxRateReconciliationForeignBranchIncome"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_mdb_EffectiveIncomeTaxRateReconciliationForeignBranchIncome_48db832e-bde2-4318-9ddd-de33f7637f52" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_55b0fb09-824e-4ba2-ad5a-fe759ce846c9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_55b0fb09-824e-4ba2-ad5a-fe759ce846c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_249778b4-48c1-471b-af90-2644ab34eff9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_249778b4-48c1-471b-af90-2644ab34eff9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_eecff066-d5a1-4e00-9855-5080393228fc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_eecff066-d5a1-4e00-9855-5080393228fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxContingenciesForeign_592f5e42-6780-4ed8-8c32-06af1fb85125" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxContingenciesForeign"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9aba10d2-c2d9-4167-a7c0-f6445ba45830" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxContingenciesForeign_592f5e42-6780-4ed8-8c32-06af1fb85125" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_9ed9187a-87a5-4423-acd9-32c95651477d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_DeferredTaxLiabilityFinanceAndOperatingLeaseRightOfUseAssets_0fa05828-cc47-4555-be96-504467f0f5d5" xlink:href="mdb-20210131.xsd#mdb_DeferredTaxLiabilityFinanceAndOperatingLeaseRightOfUseAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_9ed9187a-87a5-4423-acd9-32c95651477d" xlink:to="loc_mdb_DeferredTaxLiabilityFinanceAndOperatingLeaseRightOfUseAssets_0fa05828-cc47-4555-be96-504467f0f5d5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_DeferredTaxLiabilitiesConvertibleDebtInstruments_93f62067-92c8-45a8-96e4-a2f5c16dc7f4" xlink:href="mdb-20210131.xsd#mdb_DeferredTaxLiabilitiesConvertibleDebtInstruments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_9ed9187a-87a5-4423-acd9-32c95651477d" xlink:to="loc_mdb_DeferredTaxLiabilitiesConvertibleDebtInstruments_93f62067-92c8-45a8-96e4-a2f5c16dc7f4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome_e121bb12-c859-470b-9969-9c1be1140bd8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_9ed9187a-87a5-4423-acd9-32c95651477d" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome_e121bb12-c859-470b-9969-9c1be1140bd8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals_4fa39168-3173-4cf9-928f-042e39088e36" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_9ed9187a-87a5-4423-acd9-32c95651477d" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals_4fa39168-3173-4cf9-928f-042e39088e36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilities_9b4c1d7e-db3a-482e-b559-89dae7cc407e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_d6e33d8b-b33c-4443-aaa8-180505ca9fb0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_9b4c1d7e-db3a-482e-b559-89dae7cc407e" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_d6e33d8b-b33c-4443-aaa8-180505ca9fb0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_012e09e7-dffc-4717-a0c4-8463aca4840d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_9b4c1d7e-db3a-482e-b559-89dae7cc407e" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_012e09e7-dffc-4717-a0c4-8463aca4840d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_a2f89dd0-8d98-470c-b80e-da2ab1ce1c7c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_36014d04-9e21-4ddc-a6f8-92096593c9bc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_a2f89dd0-8d98-470c-b80e-da2ab1ce1c7c" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_36014d04-9e21-4ddc-a6f8-92096593c9bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_d3778a08-5b8a-40ff-84e2-52a995e6d421" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_a2f89dd0-8d98-470c-b80e-da2ab1ce1c7c" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_d3778a08-5b8a-40ff-84e2-52a995e6d421" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_34ae8785-6838-472d-8fde-d0b7cc7899e1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9863fd41-ebbe-40be-834a-9c1d39dd7182" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_34ae8785-6838-472d-8fde-d0b7cc7899e1" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9863fd41-ebbe-40be-834a-9c1d39dd7182" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsDeferredIncome_92cef778-8fb7-4021-be36-d5997e6f956f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsDeferredIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_34ae8785-6838-472d-8fde-d0b7cc7899e1" xlink:to="loc_us-gaap_DeferredTaxAssetsDeferredIncome_92cef778-8fb7-4021-be36-d5997e6f956f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mdb_DeferredTaxAssetFinanceAndOperatingLeaseLiabilities_27deaa68-5a3c-4a94-8962-920e240bccaa" xlink:href="mdb-20210131.xsd#mdb_DeferredTaxAssetFinanceAndOperatingLeaseLiabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_34ae8785-6838-472d-8fde-d0b7cc7899e1" xlink:to="loc_mdb_DeferredTaxAssetFinanceAndOperatingLeaseLiabilities_27deaa68-5a3c-4a94-8962-920e240bccaa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_06d71975-686a-4946-8305-c56a56d81221" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_34ae8785-6838-472d-8fde-d0b7cc7899e1" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_06d71975-686a-4946-8305-c56a56d81221" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_b95b1efb-746b-481a-a68c-7252f11ee575" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_eead831e-82ea-480d-9642-af279982c674" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_b95b1efb-746b-481a-a68c-7252f11ee575" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_eead831e-82ea-480d-9642-af279982c674" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_7e9161fe-29c7-4d6f-9ebc-3c6d42e61d6d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_b95b1efb-746b-481a-a68c-7252f11ee575" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_7e9161fe-29c7-4d6f-9ebc-3c6d42e61d6d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mongodb.com/role/IncomeTaxesAdditionalInformationDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#IncomeTaxesAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/IncomeTaxesAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.mongodb.com/role/IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetails" xlink:type="simple" xlink:href="mdb-20210131.xsd#IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetails"/>
  <link:calculationLink xlink:role="http://www.mongodb.com/role/IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetails" xlink:type="extended"/>
</link:linkbase>
