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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:e6241e09-d6fb-421c-b439-34063ef7fd24,g:c4c766ff-153b-4c22-b4c4-8974f863cdbf-->
<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-20220630.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETS"/>
  <link:calculationLink xlink:role="http://momentus.space/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_142d382d-54ac-4ac7-995e-6d0f34ccb6db" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_6cb80225-01ff-499b-bfea-254f9ec7db88" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_142d382d-54ac-4ac7-995e-6d0f34ccb6db" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_6cb80225-01ff-499b-bfea-254f9ec7db88" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_3323acce-0b52-4234-90e3-2954aed26f1b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_142d382d-54ac-4ac7-995e-6d0f34ccb6db" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_3323acce-0b52-4234-90e3-2954aed26f1b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_2bcc0bfa-9e20-4842-80e0-8024e4d26851" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_142d382d-54ac-4ac7-995e-6d0f34ccb6db" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_2bcc0bfa-9e20-4842-80e0-8024e4d26851" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstanding_8aba7564-56c7-4564-be67-d77e262efe21" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantsAndRightsOutstanding"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_142d382d-54ac-4ac7-995e-6d0f34ccb6db" xlink:to="loc_us-gaap_WarrantsAndRightsOutstanding_8aba7564-56c7-4564-be67-d77e262efe21" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermLoansPayable_8ec89ec2-7d29-45f8-91d3-fe30981b014d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermLoansPayable"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_142d382d-54ac-4ac7-995e-6d0f34ccb6db" xlink:to="loc_us-gaap_LongTermLoansPayable_8ec89ec2-7d29-45f8-91d3-fe30981b014d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_399df0bf-b8ee-4658-a339-b160014af97a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_973a9e2f-9fa8-4534-9ebc-c66d36569775" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_399df0bf-b8ee-4658-a339-b160014af97a" xlink:to="loc_us-gaap_CommonStockValue_973a9e2f-9fa8-4534-9ebc-c66d36569775" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_2cc37579-beb5-45cf-b3ea-1554dd7f68ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_399df0bf-b8ee-4658-a339-b160014af97a" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_2cc37579-beb5-45cf-b3ea-1554dd7f68ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_dd0419bd-5007-4df0-98eb-71cb1ddfe943" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_399df0bf-b8ee-4658-a339-b160014af97a" xlink:to="loc_us-gaap_AdditionalPaidInCapital_dd0419bd-5007-4df0-98eb-71cb1ddfe943" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_9b30b610-069a-46ad-a5ae-fd63bb98fdaa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_7642628d-d6e6-47ca-821f-512cf6db8842" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_9b30b610-069a-46ad-a5ae-fd63bb98fdaa" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_7642628d-d6e6-47ca-821f-512cf6db8842" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_fe7f4063-e0b1-4ffd-b77e-5c9c90f3a1aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_9b30b610-069a-46ad-a5ae-fd63bb98fdaa" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_fe7f4063-e0b1-4ffd-b77e-5c9c90f3a1aa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_21178db6-031e-4551-ac14-450b9539dc48" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_9b30b610-069a-46ad-a5ae-fd63bb98fdaa" xlink:to="loc_us-gaap_RestrictedCashCurrent_21178db6-031e-4551-ac14-450b9539dc48" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_0dae0893-c072-47bc-b4b7-15cacf8345ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_07564cbf-f4d6-4394-b910-7dbdcf4060e7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_0dae0893-c072-47bc-b4b7-15cacf8345ca" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_07564cbf-f4d6-4394-b910-7dbdcf4060e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_3da0f568-b003-4f6a-8479-ab5fc0cd8d54" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_0dae0893-c072-47bc-b4b7-15cacf8345ca" xlink:to="loc_us-gaap_LiabilitiesCurrent_3da0f568-b003-4f6a-8479-ab5fc0cd8d54" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_1c3ca2cd-49b8-480a-bda5-3b1b6513374e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_c4e7d04c-06e9-43c0-8a91-366e12713181" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_1c3ca2cd-49b8-480a-bda5-3b1b6513374e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_c4e7d04c-06e9-43c0-8a91-366e12713181" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_b141cd60-ed04-4d62-8486-d44b05dbed9f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_1c3ca2cd-49b8-480a-bda5-3b1b6513374e" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_b141cd60-ed04-4d62-8486-d44b05dbed9f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_5815b5db-6021-4664-9c57-f124286e993e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_1c3ca2cd-49b8-480a-bda5-3b1b6513374e" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_5815b5db-6021-4664-9c57-f124286e993e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab02b08b-792f-4e34-941c-56aa49204abd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_1c3ca2cd-49b8-480a-bda5-3b1b6513374e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab02b08b-792f-4e34-941c-56aa49204abd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashNoncurrent_3e307004-d6d9-41f2-9f78-04a01916f049" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_1c3ca2cd-49b8-480a-bda5-3b1b6513374e" xlink:to="loc_us-gaap_RestrictedCashNoncurrent_3e307004-d6d9-41f2-9f78-04a01916f049" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_e935729f-b051-4589-9673-8617fd622419" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_1c3ca2cd-49b8-480a-bda5-3b1b6513374e" xlink:to="loc_us-gaap_AssetsCurrent_e935729f-b051-4589-9673-8617fd622419" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_1723b3e1-e332-4567-9878-5a1c9a0416b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_bc347090-d36b-4d3d-9829-38d941e15f83" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_1723b3e1-e332-4567-9878-5a1c9a0416b0" xlink:to="loc_us-gaap_StockholdersEquity_bc347090-d36b-4d3d-9829-38d941e15f83" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_c974daaf-1863-4f7d-ad12-3c3827f4c680" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_1723b3e1-e332-4567-9878-5a1c9a0416b0" xlink:to="loc_us-gaap_CommitmentsAndContingencies_c974daaf-1863-4f7d-ad12-3c3827f4c680" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_25c8fe65-5902-4a41-b1df-4ba29461e0ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_1723b3e1-e332-4567-9878-5a1c9a0416b0" xlink:to="loc_us-gaap_Liabilities_25c8fe65-5902-4a41-b1df-4ba29461e0ee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_268b9b00-2c8e-488e-887c-d1b179a24a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_c9b3c6f6-72f8-4cb9-b949-7f220a975c67" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_268b9b00-2c8e-488e-887c-d1b179a24a4b" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_c9b3c6f6-72f8-4cb9-b949-7f220a975c67" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableCurrent_aa668835-b55f-48a1-a487-18e417f265c4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LoansPayableCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_268b9b00-2c8e-488e-887c-d1b179a24a4b" xlink:to="loc_us-gaap_LoansPayableCurrent_aa668835-b55f-48a1-a487-18e417f265c4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_d86eaecb-c335-4397-aa77-adb5646d00b9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_268b9b00-2c8e-488e-887c-d1b179a24a4b" xlink:to="loc_us-gaap_AccountsPayableCurrent_d86eaecb-c335-4397-aa77-adb5646d00b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_8769226a-4a5d-4692-8ad5-0dce0bd756e6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_268b9b00-2c8e-488e-887c-d1b179a24a4b" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_8769226a-4a5d-4692-8ad5-0dce0bd756e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_ShareRepurchaseLiabilityCurrent_0cd67cf2-b99d-4ed2-b4eb-582143a1c5c9" xlink:href="mnts-20220630.xsd#mnts_ShareRepurchaseLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_268b9b00-2c8e-488e-887c-d1b179a24a4b" xlink:to="loc_mnts_ShareRepurchaseLiabilityCurrent_0cd67cf2-b99d-4ed2-b4eb-582143a1c5c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_983d9055-7417-4032-b53b-ee142f7efaee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_268b9b00-2c8e-488e-887c-d1b179a24a4b" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_983d9055-7417-4032-b53b-ee142f7efaee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_bb90e450-c24e-4651-b2c2-431ca106d1ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_268b9b00-2c8e-488e-887c-d1b179a24a4b" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_bb90e450-c24e-4651-b2c2-431ca106d1ba" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="mnts-20220630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:calculationLink xlink:role="http://momentus.space/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_74c70e2d-a94d-4eea-9e91-74697c9dd057" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_04a11ca7-e96e-415f-a462-3828a2cfe371" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_74c70e2d-a94d-4eea-9e91-74697c9dd057" xlink:to="loc_us-gaap_OperatingExpenses_04a11ca7-e96e-415f-a462-3828a2cfe371" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_f52ab9d7-aa2e-4998-a21b-4b5b76751043" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_74c70e2d-a94d-4eea-9e91-74697c9dd057" xlink:to="loc_us-gaap_GrossProfit_f52ab9d7-aa2e-4998-a21b-4b5b76751043" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_5032df07-8abe-4185-a346-1c215328e5a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8b074268-2e71-4463-9df9-50f73bac16dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_5032df07-8abe-4185-a346-1c215328e5a2" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8b074268-2e71-4463-9df9-50f73bac16dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_b8cb8369-cd07-40fb-b2c2-c1b654c0815c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_5032df07-8abe-4185-a346-1c215328e5a2" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_b8cb8369-cd07-40fb-b2c2-c1b654c0815c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_c23ca5c5-56ba-4aec-804b-6708dc31f1d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAdjustmentOfWarrants_ceaf9707-9e8e-4180-9b31-ddc67a0e8f87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_c23ca5c5-56ba-4aec-804b-6708dc31f1d4" xlink:to="loc_us-gaap_FairValueAdjustmentOfWarrants_ceaf9707-9e8e-4180-9b31-ddc67a0e8f87" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_f435d039-abbf-4859-adeb-d885d50180bf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_c23ca5c5-56ba-4aec-804b-6708dc31f1d4" xlink:to="loc_us-gaap_InterestExpense_f435d039-abbf-4859-adeb-d885d50180bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_1df15726-3bac-40bf-8d99-abebd7ecfccf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_c23ca5c5-56ba-4aec-804b-6708dc31f1d4" xlink:to="loc_us-gaap_InvestmentIncomeInterest_1df15726-3bac-40bf-8d99-abebd7ecfccf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_ba3168ae-cf40-4c8f-a289-ae03b226f6bc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_NonoperatingIncomeExpense_c23ca5c5-56ba-4aec-804b-6708dc31f1d4" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_ba3168ae-cf40-4c8f-a289-ae03b226f6bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_FairValueAdjustmentToFinancialInstrumentsSubjectToMandatoryRedemption_db8d6571-d80c-4157-909a-d2534306fb2d" xlink:href="mnts-20220630.xsd#mnts_FairValueAdjustmentToFinancialInstrumentsSubjectToMandatoryRedemption"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_c23ca5c5-56ba-4aec-804b-6708dc31f1d4" xlink:to="loc_mnts_FairValueAdjustmentToFinancialInstrumentsSubjectToMandatoryRedemption_db8d6571-d80c-4157-909a-d2534306fb2d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_42258d82-7e04-4418-8b02-7f64f0bf6769" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_c23ca5c5-56ba-4aec-804b-6708dc31f1d4" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_42258d82-7e04-4418-8b02-7f64f0bf6769" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossRelatedToLitigationSettlement_9d00b88a-536b-430e-b97f-8a42ce1f744e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossRelatedToLitigationSettlement"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_c23ca5c5-56ba-4aec-804b-6708dc31f1d4" xlink:to="loc_us-gaap_GainLossRelatedToLitigationSettlement_9d00b88a-536b-430e-b97f-8a42ce1f744e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cc9d8102-9583-4c35-bb1f-4366d1c839f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_09c2d1d7-85c7-4e15-9361-1f0503e880aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_cc9d8102-9583-4c35-bb1f-4366d1c839f5" xlink:to="loc_us-gaap_OperatingIncomeLoss_09c2d1d7-85c7-4e15-9361-1f0503e880aa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_22e7611c-a724-456f-adab-982f0aa626b1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cc9d8102-9583-4c35-bb1f-4366d1c839f5" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_22e7611c-a724-456f-adab-982f0aa626b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_55a9a770-d940-4fad-89ac-ec7117af8101" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_16cc54b2-c11d-48ae-9421-491fdbaa38ff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_55a9a770-d940-4fad-89ac-ec7117af8101" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_16cc54b2-c11d-48ae-9421-491fdbaa38ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_ae60407d-7704-47c2-a555-218c8c653afc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_55a9a770-d940-4fad-89ac-ec7117af8101" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_ae60407d-7704-47c2-a555-218c8c653afc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_7f3e5cb1-1cb7-4f63-8788-3927ecba90c9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_66697f68-abf7-49f3-8141-49c6d41637f6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_7f3e5cb1-1cb7-4f63-8788-3927ecba90c9" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_66697f68-abf7-49f3-8141-49c6d41637f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_b5c6589a-fe09-49a4-974c-1b2d5bb03b4a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_7f3e5cb1-1cb7-4f63-8788-3927ecba90c9" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_b5c6589a-fe09-49a4-974c-1b2d5bb03b4a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="mnts-20220630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:calculationLink xlink:role="http://momentus.space/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromShortTermDebt_1a4b64db-6a5e-4c3c-85d0-5d5fa585747a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromShortTermDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:to="loc_us-gaap_ProceedsFromShortTermDebt_1a4b64db-6a5e-4c3c-85d0-5d5fa585747a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_ProceedsFromIssuanceOfFinancialInstrumentsSubjectToMandatoryRedemption_ddf45e6c-e4c1-4bd5-b23e-4dca4c0619f3" xlink:href="mnts-20220630.xsd#mnts_ProceedsFromIssuanceOfFinancialInstrumentsSubjectToMandatoryRedemption"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:to="loc_mnts_ProceedsFromIssuanceOfFinancialInstrumentsSubjectToMandatoryRedemption_ddf45e6c-e4c1-4bd5-b23e-4dca4c0619f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfNotesPayable_80b2456a-903a-4613-833c-bd070a1915cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:to="loc_us-gaap_RepaymentsOfNotesPayable_80b2456a-903a-4613-833c-bd070a1915cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PaymentOfWarrantIssuanceCosts_211b78a0-622a-49c6-a69b-b86eda188a49" xlink:href="mnts-20220630.xsd#mnts_PaymentOfWarrantIssuanceCosts"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:to="loc_mnts_PaymentOfWarrantIssuanceCosts_211b78a0-622a-49c6-a69b-b86eda188a49" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentOfLoansByEmployeeStockOwnershipPlans_a8941547-3c7e-48b3-81fc-d937b7428195" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromRepaymentOfLoansByEmployeeStockOwnershipPlans"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:to="loc_us-gaap_ProceedsFromRepaymentOfLoansByEmployeeStockOwnershipPlans_a8941547-3c7e-48b3-81fc-d937b7428195" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_7300da8b-e475-4f7f-b5a9-5adb9fab5939" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_7300da8b-e475-4f7f-b5a9-5adb9fab5939" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_96ab6da8-e261-4185-85c3-47c3e5e047e2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_96ab6da8-e261-4185-85c3-47c3e5e047e2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_df2dda67-a3ab-471c-affd-9669493b734c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_01423e60-8843-44af-bb28-40d3f57b2d02" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_df2dda67-a3ab-471c-affd-9669493b734c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_47a7e36a-a0c7-40a4-a7fc-ce243ef7eb60" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_040c546f-4200-48cd-91be-3335ee47232f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_47a7e36a-a0c7-40a4-a7fc-ce243ef7eb60" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_040c546f-4200-48cd-91be-3335ee47232f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_069b0a9e-04fb-41f1-973e-a4e67256b23f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_47a7e36a-a0c7-40a4-a7fc-ce243ef7eb60" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_069b0a9e-04fb-41f1-973e-a4e67256b23f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_cd5aadaf-545b-4018-8a6c-45be69304266" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireIntangibleAssets"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_47a7e36a-a0c7-40a4-a7fc-ce243ef7eb60" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_cd5aadaf-545b-4018-8a6c-45be69304266" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_6a519506-d825-4452-a2e0-253da8e40af2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_ebad40c3-1961-4ef0-b9de-b11843275e73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_6a519506-d825-4452-a2e0-253da8e40af2" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_ebad40c3-1961-4ef0-b9de-b11843275e73" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d5606d9c-7708-43a0-9b17-8954661d7822" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_6a519506-d825-4452-a2e0-253da8e40af2" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d5606d9c-7708-43a0-9b17-8954661d7822" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c225facc-ed5b-4365-b713-b8ac5106a8b2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_6a519506-d825-4452-a2e0-253da8e40af2" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c225facc-ed5b-4365-b713-b8ac5106a8b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_25263358-4ab9-49a6-87d7-54cd37ca44cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_25263358-4ab9-49a6-87d7-54cd37ca44cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_4b79b494-1ad6-427d-922e-794b806d5f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_4b79b494-1ad6-427d-922e-794b806d5f2d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_f363172e-e778-4758-9ebb-b787fd45df2a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInOtherCurrentLiabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_f363172e-e778-4758-9ebb-b787fd45df2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_c5c722bb-4e6b-4dde-a5e3-d54b7e8cbb44" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_c5c722bb-4e6b-4dde-a5e3-d54b7e8cbb44" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAdjustmentOfWarrants_d1297f12-f63a-4025-98f5-28beb8778ec2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_FairValueAdjustmentOfWarrants_d1297f12-f63a-4025-98f5-28beb8778ec2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_ccc9d6b9-8201-487c-9f1a-a9ee9514d970" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_ccc9d6b9-8201-487c-9f1a-a9ee9514d970" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_ca0ee887-7c55-4910-9dcc-08f2c0bd4665" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_ShareBasedCompensation_ca0ee887-7c55-4910-9dcc-08f2c0bd4665" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PrepaidLaunchCostsImpairmentCharges_ef1a351f-b12a-4ca9-a546-148baf8be6a2" xlink:href="mnts-20220630.xsd#mnts_PrepaidLaunchCostsImpairmentCharges"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_mnts_PrepaidLaunchCostsImpairmentCharges_ef1a351f-b12a-4ca9-a546-148baf8be6a2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_f9d93a07-bd2d-4e10-bd80-9d09aadb2e9e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_f9d93a07-bd2d-4e10-bd80-9d09aadb2e9e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_IncreaseDecreaseInOperatingLeaseLiabilityAndOperatingRightOfUseAsset_7523b914-4ffe-4850-83c9-04e6761ea41e" xlink:href="mnts-20220630.xsd#mnts_IncreaseDecreaseInOperatingLeaseLiabilityAndOperatingRightOfUseAsset"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_mnts_IncreaseDecreaseInOperatingLeaseLiabilityAndOperatingRightOfUseAsset_7523b914-4ffe-4850-83c9-04e6761ea41e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_8e6ef47c-c7c2-4750-95f6-be072a83ce8d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_8e6ef47c-c7c2-4750-95f6-be072a83ce8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_65fcfac3-2e36-4846-87d5-0584910e9683" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_65fcfac3-2e36-4846-87d5-0584910e9683" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_ecf6f752-6099-493d-9feb-9a62a61e01b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_ecf6f752-6099-493d-9feb-9a62a61e01b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_899ae8e9-7d15-4f2a-bc06-91fd0dbad93d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_NetIncomeLoss_899ae8e9-7d15-4f2a-bc06-91fd0dbad93d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_841d6c5e-06e2-490d-9ec3-323b043ccf46" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:calculationArc order="15" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_841d6c5e-06e2-490d-9ec3-323b043ccf46" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_724c8a04-8fba-4734-bdbf-bc6043b63d57" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_724c8a04-8fba-4734-bdbf-bc6043b63d57" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_FairValueAdjustmentOfFinancialInstrumentsSubjectToMandatoryRedemption_d60e2a67-c35d-4401-9e86-da06334ee9fd" xlink:href="mnts-20220630.xsd#mnts_FairValueAdjustmentOfFinancialInstrumentsSubjectToMandatoryRedemption"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_mnts_FairValueAdjustmentOfFinancialInstrumentsSubjectToMandatoryRedemption_d60e2a67-c35d-4401-9e86-da06334ee9fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDepreciationAndAmortization_210ba0cb-b102-4fe7-ac34-049be00969de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherDepreciationAndAmortization"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_70a99f13-18ab-4543-9183-8c3c6f875ba4" xlink:to="loc_us-gaap_OtherDepreciationAndAmortization_210ba0cb-b102-4fe7-ac34-049be00969de" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/PrepaidsandOtherCurrentAssetsDetails" xlink:type="simple" xlink:href="mnts-20220630.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_1607c8b7-0ebd-4a16-bb2d-91e90a215d1c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PrepaidLaunchCostsCurrent_bff36227-e6ec-4d56-a9f9-cb83def69813" xlink:href="mnts-20220630.xsd#mnts_PrepaidLaunchCostsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_1607c8b7-0ebd-4a16-bb2d-91e90a215d1c" xlink:to="loc_mnts_PrepaidLaunchCostsCurrent_bff36227-e6ec-4d56-a9f9-cb83def69813" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PrepaidInsuranceAndOtherAssetsCurrent_bac57b75-4377-4f52-a94d-1faf9e01ae64" xlink:href="mnts-20220630.xsd#mnts_PrepaidInsuranceAndOtherAssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_1607c8b7-0ebd-4a16-bb2d-91e90a215d1c" xlink:to="loc_mnts_PrepaidInsuranceAndOtherAssetsCurrent_bac57b75-4377-4f52-a94d-1faf9e01ae64" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_PrepaidResearchAndDevelopmentExpenseCurrent_5bcac4d3-eeb4-45cc-84d7-768fb781a6b9" xlink:href="mnts-20220630.xsd#mnts_PrepaidResearchAndDevelopmentExpenseCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_1607c8b7-0ebd-4a16-bb2d-91e90a215d1c" xlink:to="loc_mnts_PrepaidResearchAndDevelopmentExpenseCurrent_5bcac4d3-eeb4-45cc-84d7-768fb781a6b9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/PropertyMachineryandEquipmentnetDetails" xlink:type="simple" xlink:href="mnts-20220630.xsd#PropertyMachineryandEquipmentnetDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/PropertyMachineryandEquipmentnetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_0d1a03a7-14d4-47c6-bd17-4a546039f178" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_e088cccc-6ec0-466d-b403-872b6008c0c5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_0d1a03a7-14d4-47c6-bd17-4a546039f178" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_e088cccc-6ec0-466d-b403-872b6008c0c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_a8303ecb-9b0d-4385-8c90-9d443d7fced6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_0d1a03a7-14d4-47c6-bd17-4a546039f178" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_a8303ecb-9b0d-4385-8c90-9d443d7fced6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/IntangibleAssetsnetScheduleofIntangibleAssetsNetDetails" xlink:type="simple" xlink:href="mnts-20220630.xsd#IntangibleAssetsnetScheduleofIntangibleAssetsNetDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/IntangibleAssetsnetScheduleofIntangibleAssetsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_6d2f36c5-5206-4f0e-9720-c61a6c2d74c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_fc80aed4-6e7a-40cc-9f9b-0089549c01da" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_6d2f36c5-5206-4f0e-9720-c61a6c2d74c2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_fc80aed4-6e7a-40cc-9f9b-0089549c01da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_1a2c9448-e3c1-4ac6-aac5-523e2f40ea31" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_6d2f36c5-5206-4f0e-9720-c61a6c2d74c2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_1a2c9448-e3c1-4ac6-aac5-523e2f40ea31" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/IntangibleAssetsnetScheduleofFutureEstimatedAmortizationExpenseDetails" xlink:type="simple" xlink:href="mnts-20220630.xsd#IntangibleAssetsnetScheduleofFutureEstimatedAmortizationExpenseDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/IntangibleAssetsnetScheduleofFutureEstimatedAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_348116fc-885a-4bde-8c8c-376b25f411ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_a6a13892-defb-41ea-baff-fca3d382c95b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_348116fc-885a-4bde-8c8c-376b25f411ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_a6a13892-defb-41ea-baff-fca3d382c95b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_6915e480-13ec-4204-ad10-de6edde46fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_348116fc-885a-4bde-8c8c-376b25f411ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_6915e480-13ec-4204-ad10-de6edde46fe3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_c721606c-e8e0-463d-a884-4bb006c8bf51" xlink:href="mnts-20220630.xsd#mnts_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_348116fc-885a-4bde-8c8c-376b25f411ad" xlink:to="loc_mnts_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_c721606c-e8e0-463d-a884-4bb006c8bf51" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_c7252b2e-2dd6-40de-ac20-bc05de516732" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_348116fc-885a-4bde-8c8c-376b25f411ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_c7252b2e-2dd6-40de-ac20-bc05de516732" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_498d985c-7d46-416f-b66e-e24e71dd03b5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_348116fc-885a-4bde-8c8c-376b25f411ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_498d985c-7d46-416f-b66e-e24e71dd03b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_53c1b21f-0758-4033-99b2-55d6a2159f09" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_348116fc-885a-4bde-8c8c-376b25f411ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_53c1b21f-0758-4033-99b2-55d6a2159f09" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/LeasesComponentsofOperatingLeaseExpenseDetails" xlink:type="simple" xlink:href="mnts-20220630.xsd#LeasesComponentsofOperatingLeaseExpenseDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/LeasesComponentsofOperatingLeaseExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_dc2152b1-2b3f-4061-96ff-cc93e3239a4f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_d7445c2e-7b24-4a42-ba3d-f5a96d4c55c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_dc2152b1-2b3f-4061-96ff-cc93e3239a4f" xlink:to="loc_us-gaap_ShortTermLeaseCost_d7445c2e-7b24-4a42-ba3d-f5a96d4c55c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_725b5dba-2087-4acd-8e88-261bc0aa255d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_dc2152b1-2b3f-4061-96ff-cc93e3239a4f" xlink:to="loc_us-gaap_OperatingLeaseCost_725b5dba-2087-4acd-8e88-261bc0aa255d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_efae4448-281f-40e6-858d-cd23b329af1f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_dc2152b1-2b3f-4061-96ff-cc93e3239a4f" xlink:to="loc_us-gaap_VariableLeaseCost_efae4448-281f-40e6-858d-cd23b329af1f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="mnts-20220630.xsd#LeasesMaturitiesofOperatingLeaseLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_c0c2b673-a263-4193-951b-f299abca9623" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_440c9812-ffbc-4613-8998-338508182bf1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_c0c2b673-a263-4193-951b-f299abca9623" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_440c9812-ffbc-4613-8998-338508182bf1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_0563efc0-ba0f-42b7-bb00-23dd81814d00" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_c0c2b673-a263-4193-951b-f299abca9623" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_0563efc0-ba0f-42b7-bb00-23dd81814d00" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour_c2592225-6bb8-4fca-bbca-1589546a4a69" xlink:href="mnts-20220630.xsd#mnts_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_c0c2b673-a263-4193-951b-f299abca9623" xlink:to="loc_mnts_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour_c2592225-6bb8-4fca-bbca-1589546a4a69" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_45e9ca4f-b676-4458-b95e-ec1125476543" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_c0c2b673-a263-4193-951b-f299abca9623" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_45e9ca4f-b676-4458-b95e-ec1125476543" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_e2ea26bb-e5a8-4d36-8bd3-dd30546469dc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_c0c2b673-a263-4193-951b-f299abca9623" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_e2ea26bb-e5a8-4d36-8bd3-dd30546469dc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_90e5eb06-1bad-4c26-a63c-3283de73d48d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_c0c2b673-a263-4193-951b-f299abca9623" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_90e5eb06-1bad-4c26-a63c-3283de73d48d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails_1" xlink:type="simple" xlink:href="mnts-20220630.xsd#LeasesMaturitiesofOperatingLeaseLiabilitiesDetails_1"/>
  <link:calculationLink xlink:role="http://momentus.space/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_90ff9356-117c-4168-aa7a-0156dcdd0983" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_c379e89e-8d17-461c-9a4b-6e46c6b3f36a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_90ff9356-117c-4168-aa7a-0156dcdd0983" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_c379e89e-8d17-461c-9a4b-6e46c6b3f36a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_2602b5d6-faf8-4cae-b9e1-495bdb31ab2e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_90ff9356-117c-4168-aa7a-0156dcdd0983" xlink:to="loc_us-gaap_OperatingLeaseLiability_2602b5d6-faf8-4cae-b9e1-495bdb31ab2e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/AccruedExpensesDetails" xlink:type="simple" xlink:href="mnts-20220630.xsd#AccruedExpensesDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/AccruedExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_23af078a-8f90-48d9-8583-8fbcc4e36892" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_826e3499-2dbb-4e69-a94b-2d92d8fd94c8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_23af078a-8f90-48d9-8583-8fbcc4e36892" xlink:to="loc_us-gaap_AccruedProfessionalFeesCurrent_826e3499-2dbb-4e69-a94b-2d92d8fd94c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedSalariesCurrent_537c020b-77d0-4a1d-b68f-d05cda9f2cd7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_23af078a-8f90-48d9-8583-8fbcc4e36892" xlink:to="loc_us-gaap_AccruedSalariesCurrent_537c020b-77d0-4a1d-b68f-d05cda9f2cd7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_AccruedResearchAndDevelopmentExpensesCurrent_c8867422-9506-42f5-bfd1-5afce458ce22" xlink:href="mnts-20220630.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_23af078a-8f90-48d9-8583-8fbcc4e36892" xlink:to="loc_mnts_AccruedResearchAndDevelopmentExpensesCurrent_c8867422-9506-42f5-bfd1-5afce458ce22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_140ada06-e81d-4e55-bf16-3a86eed542e4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_23af078a-8f90-48d9-8583-8fbcc4e36892" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_140ada06-e81d-4e55-bf16-3a86eed542e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedPayrollTaxesCurrent_87ea53ee-7813-4ba0-aa27-2119834a027f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedPayrollTaxesCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_23af078a-8f90-48d9-8583-8fbcc4e36892" xlink:to="loc_us-gaap_AccruedPayrollTaxesCurrent_87ea53ee-7813-4ba0-aa27-2119834a027f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/StockholdersEquityDeficitandStockbasedCompensationScheduleofIncomeLossperShareDetails" xlink:type="simple" xlink:href="mnts-20220630.xsd#StockholdersEquityDeficitandStockbasedCompensationScheduleofIncomeLossperShareDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/StockholdersEquityDeficitandStockbasedCompensationScheduleofIncomeLossperShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7c2cfa62-4bde-488f-b44d-5f0f35dea142" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares_5ef2cf82-6274-4863-8f36-9717ed657a4d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7c2cfa62-4bde-488f-b44d-5f0f35dea142" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares_5ef2cf82-6274-4863-8f36-9717ed657a4d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_ad1540f7-ef1e-40ff-b49e-b223b9ff8cd9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7c2cfa62-4bde-488f-b44d-5f0f35dea142" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_ad1540f7-ef1e-40ff-b49e-b223b9ff8cd9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_73e88f37-a6b7-4eda-9fe5-10aeefe83c08" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7c2cfa62-4bde-488f-b44d-5f0f35dea142" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_73e88f37-a6b7-4eda-9fe5-10aeefe83c08" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_a588a3e4-7c76-4c8e-83d6-10131bcfa13c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7c2cfa62-4bde-488f-b44d-5f0f35dea142" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_a588a3e4-7c76-4c8e-83d6-10131bcfa13c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_cff29798-d08b-4ef3-9501-217a9e8a98e5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_FinancialInstrumentsSubjectToMandatoryRedemptionIncreaseDecreaseToEquityAmount_fe666ed6-9948-46a9-9cdb-50d14c3381a9" xlink:href="mnts-20220630.xsd#mnts_FinancialInstrumentsSubjectToMandatoryRedemptionIncreaseDecreaseToEquityAmount"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_cff29798-d08b-4ef3-9501-217a9e8a98e5" xlink:to="loc_mnts_FinancialInstrumentsSubjectToMandatoryRedemptionIncreaseDecreaseToEquityAmount_fe666ed6-9948-46a9-9cdb-50d14c3381a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_93e53281-e415-4eef-8404-389bd9eb9aa8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.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_NetIncomeLossAvailableToCommonStockholdersDiluted_cff29798-d08b-4ef3-9501-217a9e8a98e5" xlink:to="loc_us-gaap_NetIncomeLoss_93e53281-e415-4eef-8404-389bd9eb9aa8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_WarrantsFairValueAdjustment_c4f37a5d-dfa6-4079-a423-343e9407e00d" xlink:href="mnts-20220630.xsd#mnts_WarrantsFairValueAdjustment"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_cff29798-d08b-4ef3-9501-217a9e8a98e5" xlink:to="loc_mnts_WarrantsFairValueAdjustment_c4f37a5d-dfa6-4079-a423-343e9407e00d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://momentus.space/role/CommitmentandContingenciesUnconditionalPurchaseObligationsDetails" xlink:type="simple" xlink:href="mnts-20220630.xsd#CommitmentandContingenciesUnconditionalPurchaseObligationsDetails"/>
  <link:calculationLink xlink:role="http://momentus.space/role/CommitmentandContingenciesUnconditionalPurchaseObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_95606629-edfe-46e8-95db-f257c72c966e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_mnts_UnrecordedUnconditionalPurchaseObligationToBePaidAfterYearThree_8b6b1f42-1d80-4257-b503-a64ba703377b" xlink:href="mnts-20220630.xsd#mnts_UnrecordedUnconditionalPurchaseObligationToBePaidAfterYearThree"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_95606629-edfe-46e8-95db-f257c72c966e" xlink:to="loc_mnts_UnrecordedUnconditionalPurchaseObligationToBePaidAfterYearThree_8b6b1f42-1d80-4257-b503-a64ba703377b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_14c5f89f-b84a-4a9c-9817-46a545ae3d17" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_95606629-edfe-46e8-95db-f257c72c966e" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_14c5f89f-b84a-4a9c-9817-46a545ae3d17" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_6ab36879-3d71-4aef-ae28-3871c7d86cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_95606629-edfe-46e8-95db-f257c72c966e" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_6ab36879-3d71-4aef-ae28-3871c7d86cb4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_d5850c83-7438-406e-b609-186fe2fed072" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_95606629-edfe-46e8-95db-f257c72c966e" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_d5850c83-7438-406e-b609-186fe2fed072" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
