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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:aedd80cc-6192-4782-a86f-ba611fa22743,g:7cfee69e-5a4e-4d54-80d2-2a86a501e97e-->
<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://momentus.space/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="mnts-20250930.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETS"/>
  <link:calculationLink xlink:role="http://momentus.space/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_c7427096-a906-4e77-bafb-1af00558fa31" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_0fedbe77-466e-4ccc-a501-c0be2a3c4937" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c7427096-a906-4e77-bafb-1af00558fa31" xlink:to="loc_us-gaap_StockholdersEquity_0fedbe77-466e-4ccc-a501-c0be2a3c4937" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_0a5d5e6f-6d26-4163-a511-cbb05072baf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c7427096-a906-4e77-bafb-1af00558fa31" xlink:to="loc_us-gaap_Liabilities_0a5d5e6f-6d26-4163-a511-cbb05072baf8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_34d9fff8-af9f-474c-b26c-cb7e55280e30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c7427096-a906-4e77-bafb-1af00558fa31" xlink:to="loc_us-gaap_CommitmentsAndContingencies_34d9fff8-af9f-474c-b26c-cb7e55280e30" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_b2952c4f-e9b6-40dc-aa28-7b711e9408f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_f17e92dc-8f83-4823-a325-f582f738d93b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_b2952c4f-e9b6-40dc-aa28-7b711e9408f6" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_f17e92dc-8f83-4823-a325-f582f738d93b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_a730c080-d9bc-48f9-b533-c0133ccfc0f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_b2952c4f-e9b6-40dc-aa28-7b711e9408f6" xlink:to="loc_us-gaap_LiabilitiesCurrent_a730c080-d9bc-48f9-b533-c0133ccfc0f9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_cc3db6f2-76c7-4667-a429-d77246493f23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_79b6146d-74fb-4f5a-8422-184c4f9cc76b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_cc3db6f2-76c7-4667-a429-d77246493f23" xlink:to="loc_us-gaap_AssetsCurrent_79b6146d-74fb-4f5a-8422-184c4f9cc76b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_3b208f75-6038-47c5-8ede-a992d3c49f42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_cc3db6f2-76c7-4667-a429-d77246493f23" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_3b208f75-6038-47c5-8ede-a992d3c49f42" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_64a53468-d45e-4fe8-9f23-5757f0561ef8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_cc3db6f2-76c7-4667-a429-d77246493f23" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_64a53468-d45e-4fe8-9f23-5757f0561ef8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_ae399d53-9fd2-4e90-b0e3-c18524237440" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_cc3db6f2-76c7-4667-a429-d77246493f23" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_ae399d53-9fd2-4e90-b0e3-c18524237440" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCosts_38927f84-6f6f-43a7-9db2-8e9e783ec77c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCosts"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_cc3db6f2-76c7-4667-a429-d77246493f23" xlink:to="loc_us-gaap_DeferredCosts_38927f84-6f6f-43a7-9db2-8e9e783ec77c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_c5cd110d-37f6-49a2-a30e-71978d103194" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_cc3db6f2-76c7-4667-a429-d77246493f23" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_c5cd110d-37f6-49a2-a30e-71978d103194" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_3672aeef-b1cd-407b-a2ce-b89f39f5d134" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_efd10890-e523-4c0e-b84f-ae18701a729b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_3672aeef-b1cd-407b-a2ce-b89f39f5d134" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_efd10890-e523-4c0e-b84f-ae18701a729b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_WarrantLiabilityNoncurrent_ccb786d6-1d67-4da7-80de-1f9acc866e10" xlink:href="mnts-20250930.xsd#mnts_WarrantLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_3672aeef-b1cd-407b-a2ce-b89f39f5d134" xlink:to="loc_mnts_WarrantLiabilityNoncurrent_ccb786d6-1d67-4da7-80de-1f9acc866e10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_b9eeec6b-edc4-4483-9e89-e0631c9754dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_3672aeef-b1cd-407b-a2ce-b89f39f5d134" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_b9eeec6b-edc4-4483-9e89-e0631c9754dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_efd20053-da70-4e56-8f95-6f0a503c97de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_LiabilitiesNoncurrent_3672aeef-b1cd-407b-a2ce-b89f39f5d134" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_efd20053-da70-4e56-8f95-6f0a503c97de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_b9b80b27-7120-4531-81a9-3f697be21a9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_2f6e5f29-2f89-4380-ad8b-19ee03bc9854" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_b9b80b27-7120-4531-81a9-3f697be21a9a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_2f6e5f29-2f89-4380-ad8b-19ee03bc9854" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_1f2f1f25-0e75-41dd-965f-2b0c395f2c39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_b9b80b27-7120-4531-81a9-3f697be21a9a" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_1f2f1f25-0e75-41dd-965f-2b0c395f2c39" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_373a6e69-73c5-4a88-b819-c2b0d8b8abcc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_b9b80b27-7120-4531-81a9-3f697be21a9a" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_373a6e69-73c5-4a88-b819-c2b0d8b8abcc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceSettlementsReceivableCurrent_f966b273-ad6c-4dc5-8855-2b26962bd260" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InsuranceSettlementsReceivableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_b9b80b27-7120-4531-81a9-3f697be21a9a" xlink:to="loc_us-gaap_InsuranceSettlementsReceivableCurrent_f966b273-ad6c-4dc5-8855-2b26962bd260" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_82e848f5-f65e-47f7-a913-ab758a086cac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_70ffe20f-7707-41f2-ad16-1a637c942b65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_82e848f5-f65e-47f7-a913-ab758a086cac" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_70ffe20f-7707-41f2-ad16-1a637c942b65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_639c2cc8-6753-4c9f-9a7c-220ef3bf1225" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_82e848f5-f65e-47f7-a913-ab758a086cac" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_639c2cc8-6753-4c9f-9a7c-220ef3bf1225" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationReserveCurrent_9566ebc2-7a60-4113-b63c-151d76b7179c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationReserveCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_82e848f5-f65e-47f7-a913-ab758a086cac" xlink:to="loc_us-gaap_LitigationReserveCurrent_9566ebc2-7a60-4113-b63c-151d76b7179c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableCurrent_5da628eb-12c7-439b-afca-3acd616b3e1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansPayableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_82e848f5-f65e-47f7-a913-ab758a086cac" xlink:to="loc_us-gaap_LoansPayableCurrent_5da628eb-12c7-439b-afca-3acd616b3e1d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_4f486926-7c7f-49de-90d5-07db34d0ef67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_82e848f5-f65e-47f7-a913-ab758a086cac" xlink:to="loc_us-gaap_AccountsPayableCurrent_4f486926-7c7f-49de-90d5-07db34d0ef67" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_2bee7b5d-2a15-4344-9d41-58424e8bbf4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_82e848f5-f65e-47f7-a913-ab758a086cac" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_2bee7b5d-2a15-4344-9d41-58424e8bbf4b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_3dd6c1c6-d6ba-4616-9111-a7ebf6f3f68e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_82e848f5-f65e-47f7-a913-ab758a086cac" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_3dd6c1c6-d6ba-4616-9111-a7ebf6f3f68e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_afd96939-66ac-4fd0-b96d-e81b27bb3916" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_7e6b3ef7-6a7f-41fb-84aa-4977e9b2f308" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_afd96939-66ac-4fd0-b96d-e81b27bb3916" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_7e6b3ef7-6a7f-41fb-84aa-4977e9b2f308" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_820a422e-9c65-47ba-bddb-083b39650a5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_afd96939-66ac-4fd0-b96d-e81b27bb3916" xlink:to="loc_us-gaap_AdditionalPaidInCapital_820a422e-9c65-47ba-bddb-083b39650a5f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_46305869-0322-45ad-85d1-898c1be47256" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_afd96939-66ac-4fd0-b96d-e81b27bb3916" xlink:to="loc_us-gaap_CommonStockValue_46305869-0322-45ad-85d1-898c1be47256" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_d722e377-3641-4e1f-a0c9-31def141a7d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_afd96939-66ac-4fd0-b96d-e81b27bb3916" xlink:to="loc_us-gaap_PreferredStockValue_d722e377-3641-4e1f-a0c9-31def141a7d9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="mnts-20250930.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:calculationLink xlink:role="http://momentus.space/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_404da921-4390-4976-887a-abad31c4dce1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_9b451682-96a8-4968-a97d-2bf8a4af5863" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_404da921-4390-4976-887a-abad31c4dce1" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_9b451682-96a8-4968-a97d-2bf8a4af5863" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_7ff39ea4-a250-4a21-9206-8e6bcc6c4754" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_404da921-4390-4976-887a-abad31c4dce1" xlink:to="loc_us-gaap_OperatingIncomeLoss_7ff39ea4-a250-4a21-9206-8e6bcc6c4754" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_dc610785-8cce-43dd-873e-bcf2b24b386a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_9c86adf7-4f64-49f9-a268-27505c141dbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_dc610785-8cce-43dd-873e-bcf2b24b386a" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_9c86adf7-4f64-49f9-a268-27505c141dbb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_f4104022-335f-415e-96b1-bfb0a6aa9050" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_dc610785-8cce-43dd-873e-bcf2b24b386a" xlink:to="loc_us-gaap_InvestmentIncomeInterest_f4104022-335f-415e-96b1-bfb0a6aa9050" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_29a6381d-94cc-479a-af78-e23c96f9caed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_dc610785-8cce-43dd-873e-bcf2b24b386a" xlink:to="loc_us-gaap_InterestExpenseNonoperating_29a6381d-94cc-479a-af78-e23c96f9caed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_0a90f920-a630-4835-af01-95dfe279b0e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_dc610785-8cce-43dd-873e-bcf2b24b386a" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_0a90f920-a630-4835-af01-95dfe279b0e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_ConvertibleDebtFairValueAdjustment_544e72a1-83c0-441f-b1a0-05ca3ef3a6f2" xlink:href="mnts-20250930.xsd#mnts_ConvertibleDebtFairValueAdjustment"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_dc610785-8cce-43dd-873e-bcf2b24b386a" xlink:to="loc_mnts_ConvertibleDebtFairValueAdjustment_544e72a1-83c0-441f-b1a0-05ca3ef3a6f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_8d070f74-71db-48c4-b7c8-e8ef6cb4239f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_dc610785-8cce-43dd-873e-bcf2b24b386a" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_8d070f74-71db-48c4-b7c8-e8ef6cb4239f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_6b5f38ad-3a23-4c04-bf4f-cf093e1e3f13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_4d94fa09-f510-4dae-9e44-5ef449f48978" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_6b5f38ad-3a23-4c04-bf4f-cf093e1e3f13" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_4d94fa09-f510-4dae-9e44-5ef449f48978" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_d8d667ea-679a-48b3-b420-cd5d0a354cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_6b5f38ad-3a23-4c04-bf4f-cf093e1e3f13" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_d8d667ea-679a-48b3-b420-cd5d0a354cb7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_8ceb884f-f3cc-41d2-b4da-02415b6de066" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_776cddd0-96ff-4c3b-a035-bea46e9a4028" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_8ceb884f-f3cc-41d2-b4da-02415b6de066" xlink:to="loc_us-gaap_OperatingExpenses_776cddd0-96ff-4c3b-a035-bea46e9a4028" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_9416fda7-4280-4a95-bbca-c4ef50126f26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_8ceb884f-f3cc-41d2-b4da-02415b6de066" xlink:to="loc_us-gaap_GrossProfit_9416fda7-4280-4a95-bbca-c4ef50126f26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_49bfc0fb-35ac-4bec-a074-9e8ae3e2415e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_1064ef4b-3d7f-4846-a65d-3fbc6ba58b5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_49bfc0fb-35ac-4bec-a074-9e8ae3e2415e" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_1064ef4b-3d7f-4846-a65d-3fbc6ba58b5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9e87ed25-2f60-482d-b46a-dda5439c403a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_49bfc0fb-35ac-4bec-a074-9e8ae3e2415e" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9e87ed25-2f60-482d-b46a-dda5439c403a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="mnts-20250930.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:calculationLink xlink:role="http://momentus.space/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7cb4855b-4778-405b-8283-750ea830f25a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_b6422797-4d75-4111-bb1c-42f40db67060" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7cb4855b-4778-405b-8283-750ea830f25a" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_b6422797-4d75-4111-bb1c-42f40db67060" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_49fbe409-ca90-4216-b4f0-5076f28dd051" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7cb4855b-4778-405b-8283-750ea830f25a" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_49fbe409-ca90-4216-b4f0-5076f28dd051" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9283fc58-1b12-43da-990f-25be87b220d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7cb4855b-4778-405b-8283-750ea830f25a" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9283fc58-1b12-43da-990f-25be87b220d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_05f03381-8a29-4b56-b9f1-249eb27a0c13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_05f03381-8a29-4b56-b9f1-249eb27a0c13" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfConvertibleDebt_72a4dbca-4c03-4cad-902c-225beac071c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfConvertibleDebt"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_RepaymentsOfConvertibleDebt_72a4dbca-4c03-4cad-902c-225beac071c7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfNotesPayable_edd26e23-faf5-44f2-98bf-5e801baa0c03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfNotesPayable"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_RepaymentsOfNotesPayable_edd26e23-faf5-44f2-98bf-5e801baa0c03" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_4360b4ef-0004-4219-98f6-8ed6d23f816e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_4360b4ef-0004-4219-98f6-8ed6d23f816e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromWarrantExercises_5b221d67-9b7f-4404-baea-662c49cc1b7c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromWarrantExercises"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_ProceedsFromWarrantExercises_5b221d67-9b7f-4404-baea-662c49cc1b7c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfWarrants_22871c38-5a79-4156-a543-5e5c1ee27fa3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfWarrants"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfWarrants_22871c38-5a79-4156-a543-5e5c1ee27fa3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_9735e715-77b7-48d0-95b9-ead56899b4cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_9735e715-77b7-48d0-95b9-ead56899b4cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PaymentOfDeferredOfferingCosts_c0748436-5772-4f23-a0bc-cb7c2866ac06" xlink:href="mnts-20250930.xsd#mnts_PaymentOfDeferredOfferingCosts"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_mnts_PaymentOfDeferredOfferingCosts_c0748436-5772-4f23-a0bc-cb7c2866ac06" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_3612936c-1190-420a-b9b9-a6a5e2f51319" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_3612936c-1190-420a-b9b9-a6a5e2f51319" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_b3082542-4827-4610-9eac-290f681d1541" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8336147-2970-4013-86f3-bd9b522e731b" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_b3082542-4827-4610-9eac-290f681d1541" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_03c14a37-5242-4c1a-887b-c37eab319d10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_62564eac-25cf-43e5-8902-6d0b27187c3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireIntangibleAssets"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_03c14a37-5242-4c1a-887b-c37eab319d10" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_62564eac-25cf-43e5-8902-6d0b27187c3f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_5a1e3b51-0713-4522-b3fd-7883b7a7ddcd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_03c14a37-5242-4c1a-887b-c37eab319d10" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_5a1e3b51-0713-4522-b3fd-7883b7a7ddcd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_b46424db-594f-43b7-93af-9bb179c931bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_b46424db-594f-43b7-93af-9bb179c931bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_ConvertibleDebtFairValueAdjustment_a2062c46-9267-47d5-ba03-f66962a6080c" xlink:href="mnts-20250930.xsd#mnts_ConvertibleDebtFairValueAdjustment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_mnts_ConvertibleDebtFairValueAdjustment_a2062c46-9267-47d5-ba03-f66962a6080c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_a4f59c14-3b40-4d3d-8b83-beb43ea4aa87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_a4f59c14-3b40-4d3d-8b83-beb43ea4aa87" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost_7032f4c5-b431-4079-bc6a-6a8abf6fbba3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost_7032f4c5-b431-4079-bc6a-6a8abf6fbba3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInsuranceSettlementsReceivable_8ec88dd6-c689-488d-8125-341705334551" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInsuranceSettlementsReceivable"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInInsuranceSettlementsReceivable_8ec88dd6-c689-488d-8125-341705334551" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_f8f9b944-9bc9-42ae-b1bd-1cb453d0351f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_f8f9b944-9bc9-42ae-b1bd-1cb453d0351f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_76eda054-4e77-416f-bdc3-1c80ad219f78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_76eda054-4e77-416f-bdc3-1c80ad219f78" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_e835a7ee-6ddf-4d59-9a20-d9b459a85911" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_NetIncomeLoss_e835a7ee-6ddf-4d59-9a20-d9b459a85911" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDepreciationAndAmortization_f27ae955-ed21-47a0-b1e8-5f9b22e54ee3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherDepreciationAndAmortization"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_OtherDepreciationAndAmortization_f27ae955-ed21-47a0-b1e8-5f9b22e54ee3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_dc9c98ae-8212-433e-8453-994d16bed5e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_dc9c98ae-8212-433e-8453-994d16bed5e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_b0ec2b34-d563-4df1-90df-5ef48c638352" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_b0ec2b34-d563-4df1-90df-5ef48c638352" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_c1aa5e51-5fb9-47eb-9014-0ed64d01bb54" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_ShareBasedCompensation_c1aa5e51-5fb9-47eb-9014-0ed64d01bb54" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_IssuanceOfConvertibleNotesForLegalServices_2e76e0ed-c46f-46d4-baa7-f75b4890efa2" xlink:href="mnts-20250930.xsd#mnts_IssuanceOfConvertibleNotesForLegalServices"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_mnts_IssuanceOfConvertibleNotesForLegalServices_2e76e0ed-c46f-46d4-baa7-f75b4890efa2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_7841925d-4cf7-4fd4-8e39-946030f6b39a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_7841925d-4cf7-4fd4-8e39-946030f6b39a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_31168e00-c1f4-4e7b-b555-431be6fd87fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_31168e00-c1f4-4e7b-b555-431be6fd87fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_40fa1530-c4e3-49f9-b4d0-f581a6d80eea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_40fa1530-c4e3-49f9-b4d0-f581a6d80eea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_8c232671-5b5b-4b76-a35d-df3f2bebf36e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherCurrentLiabilities"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_8c232671-5b5b-4b76-a35d-df3f2bebf36e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_0b730a4d-5843-4803-b3d9-6aef33d92564" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_0b730a4d-5843-4803-b3d9-6aef33d92564" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_4d64142d-cdd8-4211-8dae-9b297ed66f7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:calculationArc order="19" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_4d64142d-cdd8-4211-8dae-9b297ed66f7a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_IncreaseDecreaseInLitigationSettlementContingency_f094ea9b-b7d5-4820-88eb-decb2cd82752" xlink:href="mnts-20250930.xsd#mnts_IncreaseDecreaseInLitigationSettlementContingency"/>
    <link:calculationArc order="20" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_mnts_IncreaseDecreaseInLitigationSettlementContingency_f094ea9b-b7d5-4820-88eb-decb2cd82752" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_c38f33a8-8fe8-48b7-b0a6-041482bef111" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:calculationArc order="21" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_c38f33a8-8fe8-48b7-b0a6-041482bef111" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_GainLossOnIssuanceOfWarrantLiabilities_d7f740cb-6237-46f3-8588-763d2d512827" xlink:href="mnts-20250930.xsd#mnts_GainLossOnIssuanceOfWarrantLiabilities"/>
    <link:calculationArc order="22" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6f339548-818b-46ac-b6ab-0a9d3619c26a" xlink:to="loc_mnts_GainLossOnIssuanceOfWarrantLiabilities_d7f740cb-6237-46f3-8588-763d2d512827" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/PrepaidsandOtherCurrentAssetsDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#PrepaidsandOtherCurrentAssetsDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/PrepaidsandOtherCurrentAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_ce824bc5-a2f4-4a07-85e9-a66f9a321a51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PrepaidInsuranceAndOtherAssetsCurrent_2fc12cc8-0810-477e-9bf2-6bbdb7ff06af" xlink:href="mnts-20250930.xsd#mnts_PrepaidInsuranceAndOtherAssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_ce824bc5-a2f4-4a07-85e9-a66f9a321a51" xlink:to="loc_mnts_PrepaidInsuranceAndOtherAssetsCurrent_2fc12cc8-0810-477e-9bf2-6bbdb7ff06af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PrepaidLaunchCostsCurrent_e9dbbb47-8a49-41a3-bd63-08dae2dd35b8" xlink:href="mnts-20250930.xsd#mnts_PrepaidLaunchCostsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_ce824bc5-a2f4-4a07-85e9-a66f9a321a51" xlink:to="loc_mnts_PrepaidLaunchCostsCurrent_e9dbbb47-8a49-41a3-bd63-08dae2dd35b8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/PropertyMachineryandEquipmentDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#PropertyMachineryandEquipmentDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/PropertyMachineryandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_ff4f977c-409b-4718-bb63-d3daebebab10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_1b0a0c0c-7127-4025-9188-77bd345725f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_ff4f977c-409b-4718-bb63-d3daebebab10" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_1b0a0c0c-7127-4025-9188-77bd345725f9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_96d00ab7-bd9a-4982-8956-290ad84ec697" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_ff4f977c-409b-4718-bb63-d3daebebab10" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_96d00ab7-bd9a-4982-8956-290ad84ec697" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/IntangibleAssetsScheduleofIntangibleAssetsNetDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#IntangibleAssetsScheduleofIntangibleAssetsNetDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/IntangibleAssetsScheduleofIntangibleAssetsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_c5fef79d-c176-4b92-a1a4-5bd3a9c904c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_98dc5d78-2425-440d-a5f1-812af082d85c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_c5fef79d-c176-4b92-a1a4-5bd3a9c904c2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_98dc5d78-2425-440d-a5f1-812af082d85c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_943cfd94-1795-443e-8a3f-6599607fd537" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_c5fef79d-c176-4b92-a1a4-5bd3a9c904c2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_943cfd94-1795-443e-8a3f-6599607fd537" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/IntangibleAssetsScheduleofFutureEstimatedAmortizationExpenseDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#IntangibleAssetsScheduleofFutureEstimatedAmortizationExpenseDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/IntangibleAssetsScheduleofFutureEstimatedAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_3a8e15cd-6f5a-4c40-bc91-eb2efbbfc9d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_7bc9d7c5-0db0-4b85-87c4-96b5bff719c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_3a8e15cd-6f5a-4c40-bc91-eb2efbbfc9d8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_7bc9d7c5-0db0-4b85-87c4-96b5bff719c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_d3f42b98-b641-4204-8d9a-347b4bcb6d36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_3a8e15cd-6f5a-4c40-bc91-eb2efbbfc9d8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_d3f42b98-b641-4204-8d9a-347b4bcb6d36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_81dbfaaa-11e0-432e-9c49-528d681fe013" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_3a8e15cd-6f5a-4c40-bc91-eb2efbbfc9d8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_81dbfaaa-11e0-432e-9c49-528d681fe013" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_8eb11f63-4322-4add-b0c3-4ebc9402f61f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_3a8e15cd-6f5a-4c40-bc91-eb2efbbfc9d8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_8eb11f63-4322-4add-b0c3-4ebc9402f61f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_73dcebe6-24d0-406b-a55a-c46bad40ef88" xlink:href="mnts-20250930.xsd#mnts_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_3a8e15cd-6f5a-4c40-bc91-eb2efbbfc9d8" xlink:to="loc_mnts_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_73dcebe6-24d0-406b-a55a-c46bad40ef88" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_847ddb23-0cf7-49df-99b8-fb6a01a946e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_3a8e15cd-6f5a-4c40-bc91-eb2efbbfc9d8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_847ddb23-0cf7-49df-99b8-fb6a01a946e1" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/LeasesScheduleofComponentsofOperatingLeaseExpenseDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#LeasesScheduleofComponentsofOperatingLeaseExpenseDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/LeasesScheduleofComponentsofOperatingLeaseExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_84dbacc3-1755-4875-9e2e-eba2e46cd40d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_5e203fe6-bfd0-4e1e-aa80-60e0896244e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_84dbacc3-1755-4875-9e2e-eba2e46cd40d" xlink:to="loc_us-gaap_VariableLeaseCost_5e203fe6-bfd0-4e1e-aa80-60e0896244e3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_4dda5e1b-b789-4cbd-b2da-27e1fc5d79f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_84dbacc3-1755-4875-9e2e-eba2e46cd40d" xlink:to="loc_us-gaap_OperatingLeaseCost_4dda5e1b-b789-4cbd-b2da-27e1fc5d79f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_621c8934-9012-400b-b662-46cfa9cb26a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_84dbacc3-1755-4875-9e2e-eba2e46cd40d" xlink:to="loc_us-gaap_ShortTermLeaseCost_621c8934-9012-400b-b662-46cfa9cb26a4" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_58a8fe69-4809-4f49-9564-34e037aa5751" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_85753c6b-1c9c-429c-920c-24252a4d6ef9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_58a8fe69-4809-4f49-9564-34e037aa5751" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_85753c6b-1c9c-429c-920c-24252a4d6ef9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_6002f648-9b3d-47e5-8c4f-44c101f2a823" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_58a8fe69-4809-4f49-9564-34e037aa5751" xlink:to="loc_us-gaap_OperatingLeaseLiability_6002f648-9b3d-47e5-8c4f-44c101f2a823" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails_1" xlink:type="simple" xlink:href="mnts-20250930.xsd#LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails_1"/>
  <link:calculationLink xlink:role="http://momentus.space/role/LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_a6eb5129-85c8-4ed7-9e37-55ec57467aa0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_62a8f3c7-6384-4e9f-89fd-fa1bc6ceae1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_a6eb5129-85c8-4ed7-9e37-55ec57467aa0" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_62a8f3c7-6384-4e9f-89fd-fa1bc6ceae1c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_f041b261-e4ea-4530-84ff-7fb1ba1c596b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_a6eb5129-85c8-4ed7-9e37-55ec57467aa0" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_f041b261-e4ea-4530-84ff-7fb1ba1c596b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/AccruedLiabilitiesDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#AccruedLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/AccruedLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_4fb7c5f5-a7f4-4c26-ac91-910bd6121a3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_b933a93c-ece7-4f1c-9fed-d2be994fee22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedProfessionalFeesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_4fb7c5f5-a7f4-4c26-ac91-910bd6121a3e" xlink:to="loc_us-gaap_AccruedProfessionalFeesCurrent_b933a93c-ece7-4f1c-9fed-d2be994fee22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedSalariesCurrent_865b6408-342d-422f-b54f-1dca5a501043" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedSalariesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_4fb7c5f5-a7f4-4c26-ac91-910bd6121a3e" xlink:to="loc_us-gaap_AccruedSalariesCurrent_865b6408-342d-422f-b54f-1dca5a501043" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_AccruedResearchAndDevelopmentExpensesCurrent_da520d0e-b348-4024-a5cb-b0ccba577f0b" xlink:href="mnts-20250930.xsd#mnts_AccruedResearchAndDevelopmentExpensesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_4fb7c5f5-a7f4-4c26-ac91-910bd6121a3e" xlink:to="loc_mnts_AccruedResearchAndDevelopmentExpensesCurrent_da520d0e-b348-4024-a5cb-b0ccba577f0b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_AccruedOfferingCostsCurrent_1587d962-bd1d-407b-81c7-763be8d73d9c" xlink:href="mnts-20250930.xsd#mnts_AccruedOfferingCostsCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_4fb7c5f5-a7f4-4c26-ac91-910bd6121a3e" xlink:to="loc_mnts_AccruedOfferingCostsCurrent_1587d962-bd1d-407b-81c7-763be8d73d9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_7269c6ae-5946-4494-b0eb-8a7f99c3c195" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_4fb7c5f5-a7f4-4c26-ac91-910bd6121a3e" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_7269c6ae-5946-4494-b0eb-8a7f99c3c195" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/LoanPayableSIVConvertiblePromissoryNotesDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#LoanPayableSIVConvertiblePromissoryNotesDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/LoanPayableSIVConvertiblePromissoryNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PostponedRepaymentsOfConvertibleDebt_ff6ba3c7-af12-4e24-b4e9-70fab9106959" xlink:href="mnts-20250930.xsd#mnts_PostponedRepaymentsOfConvertibleDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PostponedInterestRepaymentsOfConvertibleDebt_55e1ef25-0739-4dc5-9fd0-2d9148cbb2e6" xlink:href="mnts-20250930.xsd#mnts_PostponedInterestRepaymentsOfConvertibleDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_mnts_PostponedRepaymentsOfConvertibleDebt_ff6ba3c7-af12-4e24-b4e9-70fab9106959" xlink:to="loc_mnts_PostponedInterestRepaymentsOfConvertibleDebt_55e1ef25-0739-4dc5-9fd0-2d9148cbb2e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PostponedPrincipalRepaymentsOfConvertibleDebt_bcba5c75-d20e-4983-a55c-4cabe5d2af35" xlink:href="mnts-20250930.xsd#mnts_PostponedPrincipalRepaymentsOfConvertibleDebt"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_mnts_PostponedRepaymentsOfConvertibleDebt_ff6ba3c7-af12-4e24-b4e9-70fab9106959" xlink:to="loc_mnts_PostponedPrincipalRepaymentsOfConvertibleDebt_bcba5c75-d20e-4983-a55c-4cabe5d2af35" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/CommitmentandContingenciesScheduleofUnconditionalPurchaseObligationsDetails" xlink:type="simple" xlink:href="mnts-20250930.xsd#CommitmentandContingenciesScheduleofUnconditionalPurchaseObligationsDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/CommitmentandContingenciesScheduleofUnconditionalPurchaseObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_ac0bc487-6082-4183-be7e-c2383e63d537" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_0c97f5df-ff85-4174-ad7b-defd471b699f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_ac0bc487-6082-4183-be7e-c2383e63d537" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_0c97f5df-ff85-4174-ad7b-defd471b699f" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
