diff --git a/common/antes.ts b/common/antes.ts
index 287f32d3..15081b45 100644
--- a/common/antes.ts
+++ b/common/antes.ts
@@ -1,5 +1,5 @@
 import { Bet } from './bet'
-import { getProbability } from './calculate'
+import { getProbability } from './calculate-dpm'
 import { getCpmmProbability } from './calculate-cpmm'
 import { Binary, CPMM, DPM, FreeResponse, FullContract } from './contract'
 import { User } from './user'
diff --git a/common/calculate.ts b/common/calculate-dpm.ts
similarity index 100%
rename from common/calculate.ts
rename to common/calculate-dpm.ts
diff --git a/common/new-bet.ts b/common/new-bet.ts
index 161a44a9..ce8bdc1a 100644
--- a/common/new-bet.ts
+++ b/common/new-bet.ts
@@ -4,7 +4,7 @@ import {
   calculateShares,
   getProbability,
   getOutcomeProbability,
-} from './calculate'
+} from './calculate-dpm'
 import { calculateCpmmShares, getCpmmProbability } from './calculate-cpmm'
 import {
   Binary,
diff --git a/common/payouts.ts b/common/payouts.ts
index ed9e0613..306b6051 100644
--- a/common/payouts.ts
+++ b/common/payouts.ts
@@ -1,7 +1,7 @@
 import * as _ from 'lodash'
 
 import { Bet } from './bet'
-import { deductFees, getProbability } from './calculate'
+import { deductFees, getProbability } from './calculate-dpm'
 import {
   Binary,
   Contract,
diff --git a/common/sell-bet.ts b/common/sell-bet.ts
index 907391e4..7013c3d9 100644
--- a/common/sell-bet.ts
+++ b/common/sell-bet.ts
@@ -1,5 +1,9 @@
 import { Bet } from './bet'
-import { calculateShareValue, deductFees, getProbability } from './calculate'
+import {
+  calculateShareValue,
+  deductFees,
+  getProbability,
+} from './calculate-dpm'
 import {
   calculateCpmmSale,
   calculateCpmmShareValue,
diff --git a/functions/src/emails.ts b/functions/src/emails.ts
index 0ded7b7d..0d5d38c7 100644
--- a/functions/src/emails.ts
+++ b/functions/src/emails.ts
@@ -1,7 +1,7 @@
 import _ = require('lodash')
 import { Answer } from '../../common/answer'
 import { Bet } from '../../common/bet'
-import { getProbability } from '../../common/calculate'
+import { getProbability } from '../../common/calculate-dpm'
 import { Comment } from '../../common/comment'
 import { Contract } from '../../common/contract'
 import { CREATOR_FEE } from '../../common/fees'
diff --git a/functions/src/markets.ts b/functions/src/markets.ts
index f9188987..31bc7d64 100644
--- a/functions/src/markets.ts
+++ b/functions/src/markets.ts
@@ -4,7 +4,7 @@ import * as _ from 'lodash'
 
 import { getValues } from './utils'
 import { Contract } from '../../common/contract'
-import { getProbability } from '../../common/calculate'
+import { getProbability } from '../../common/calculate-dpm'
 
 const cache = { lastUpdated: 0, data: '' }
 
diff --git a/functions/src/scripts/correct-bet-probability.ts b/functions/src/scripts/correct-bet-probability.ts
index 47ffdb58..50678034 100644
--- a/functions/src/scripts/correct-bet-probability.ts
+++ b/functions/src/scripts/correct-bet-probability.ts
@@ -5,7 +5,7 @@ import { initAdmin } from './script-init'
 initAdmin('stephen')
 
 import { Bet } from '../../../common/bet'
-import { getProbability } from '../../../common/calculate'
+import { getProbability } from '../../../common/calculate-dpm'
 import { Contract } from '../../../common/contract'
 
 type DocRef = admin.firestore.DocumentReference
diff --git a/functions/src/scripts/migrate-to-dpm-2.ts b/functions/src/scripts/migrate-to-dpm-2.ts
index 80523a95..e61fa302 100644
--- a/functions/src/scripts/migrate-to-dpm-2.ts
+++ b/functions/src/scripts/migrate-to-dpm-2.ts
@@ -6,7 +6,7 @@ initAdmin('stephenDev')
 
 import { Contract } from '../../../common/contract'
 import { Bet } from '../../../common/bet'
-import { calculateShares, getProbability } from '../../../common/calculate'
+import { calculateShares, getProbability } from '../../../common/calculate-dpm'
 import { getSellBetInfo } from '../../../common/sell-bet'
 import { User } from '../../../common/user'
 
diff --git a/functions/src/update-user-metrics.ts b/functions/src/update-user-metrics.ts
index d1d13727..ec18e2e8 100644
--- a/functions/src/update-user-metrics.ts
+++ b/functions/src/update-user-metrics.ts
@@ -6,7 +6,7 @@ import { getValues } from './utils'
 import { Contract } from '../../common/contract'
 import { Bet } from '../../common/bet'
 import { User } from '../../common/user'
-import { calculatePayout } from '../../common/calculate'
+import { calculatePayout } from '../../common/calculate-dpm'
 
 const firestore = admin.firestore()
 
diff --git a/web/components/answers/answer-bet-panel.tsx b/web/components/answers/answer-bet-panel.tsx
index bddaa609..84e5fb45 100644
--- a/web/components/answers/answer-bet-panel.tsx
+++ b/web/components/answers/answer-bet-panel.tsx
@@ -22,7 +22,7 @@ import {
   getOutcomeProbability,
   calculateShares,
   calculatePayoutAfterCorrectBet,
-} from '../../../common/calculate'
+} from '../../../common/calculate-dpm'
 import { firebaseLogin } from '../../lib/firebase/users'
 import { Bet } from '../../../common/bet'
 
diff --git a/web/components/answers/answer-item.tsx b/web/components/answers/answer-item.tsx
index 7919f84d..883bd86d 100644
--- a/web/components/answers/answer-item.tsx
+++ b/web/components/answers/answer-item.tsx
@@ -10,7 +10,7 @@ import { Avatar } from '../avatar'
 import { SiteLink } from '../site-link'
 import { BuyButton } from '../yes-no-selector'
 import { formatPercent } from '../../../common/util/format'
-import { getOutcomeProbability } from '../../../common/calculate'
+import { getOutcomeProbability } from '../../../common/calculate-dpm'
 import { tradingAllowed } from '../../lib/firebase/contracts'
 import { AnswerBetPanel } from './answer-bet-panel'
 import { ContractFeed } from '../contract-feed'
diff --git a/web/components/answers/answers-panel.tsx b/web/components/answers/answers-panel.tsx
index 3781311a..a5c748c1 100644
--- a/web/components/answers/answers-panel.tsx
+++ b/web/components/answers/answers-panel.tsx
@@ -6,7 +6,7 @@ import { DPM, FreeResponse, FullContract } from '../../../common/contract'
 import { Col } from '../layout/col'
 import { formatPercent } from '../../../common/util/format'
 import { useUser } from '../../hooks/use-user'
-import { getOutcomeProbability } from '../../../common/calculate'
+import { getOutcomeProbability } from '../../../common/calculate-dpm'
 import { useAnswers } from '../../hooks/use-answers'
 import { tradingAllowed } from '../../lib/firebase/contracts'
 import { AnswerItem } from './answer-item'
diff --git a/web/components/answers/create-answer-panel.tsx b/web/components/answers/create-answer-panel.tsx
index dc21dcc7..72b70356 100644
--- a/web/components/answers/create-answer-panel.tsx
+++ b/web/components/answers/create-answer-panel.tsx
@@ -24,7 +24,7 @@ import {
   getProbabilityAfterBet,
   calculateShares,
   calculatePayoutAfterCorrectBet,
-} from '../../../common/calculate'
+} from '../../../common/calculate-dpm'
 import { firebaseLogin } from '../../lib/firebase/users'
 import { Bet } from '../../../common/bet'
 
diff --git a/web/components/bet-panel.tsx b/web/components/bet-panel.tsx
index 67f304c5..c00f6a5a 100644
--- a/web/components/bet-panel.tsx
+++ b/web/components/bet-panel.tsx
@@ -18,7 +18,7 @@ import {
   calculateShares,
   getProbabilityAfterBet,
   calculatePayoutAfterCorrectBet,
-} from '../../common/calculate'
+} from '../../common/calculate-dpm'
 import { firebaseLogin } from '../lib/firebase/users'
 import { Bet } from '../../common/bet'
 import { placeBet } from '../lib/firebase/api-call'
diff --git a/web/components/bets-list.tsx b/web/components/bets-list.tsx
index 7c6e5ffe..88312766 100644
--- a/web/components/bets-list.tsx
+++ b/web/components/bets-list.tsx
@@ -29,7 +29,7 @@ import {
   getProbability,
   getProbabilityAfterSale,
   resolvedPayout,
-} from '../../common/calculate'
+} from '../../common/calculate-dpm'
 import { sellBet } from '../lib/firebase/api-call'
 import { ConfirmationButton } from './confirmation-button'
 import { OutcomeLabel, YesLabel, NoLabel } from './outcome-label'
diff --git a/web/components/contract-prob-graph.tsx b/web/components/contract-prob-graph.tsx
index d764179c..feae5a64 100644
--- a/web/components/contract-prob-graph.tsx
+++ b/web/components/contract-prob-graph.tsx
@@ -2,7 +2,7 @@ import { DatumValue } from '@nivo/core'
 import { ResponsiveLine } from '@nivo/line'
 import dayjs from 'dayjs'
 import { Bet } from '../../common/bet'
-import { getProbability } from '../../common/calculate'
+import { getProbability } from '../../common/calculate-dpm'
 import { useBetsWithoutAntes } from '../hooks/use-bets'
 import { useWindowSize } from '../hooks/use-window-size'
 import { Contract } from '../lib/firebase/contracts'
diff --git a/web/components/resolution-panel.tsx b/web/components/resolution-panel.tsx
index f6cc58e1..45963f64 100644
--- a/web/components/resolution-panel.tsx
+++ b/web/components/resolution-panel.tsx
@@ -10,7 +10,7 @@ import { Spacer } from './layout/spacer'
 import { ResolveConfirmationButton } from './confirmation-button'
 import { resolveMarket } from '../lib/firebase/api-call'
 import { ProbabilitySelector } from './probability-selector'
-import { getProbability } from '../../common/calculate'
+import { getProbability } from '../../common/calculate-dpm'
 import { CREATOR_FEE } from '../../common/fees'
 
 export function ResolutionPanel(props: {
diff --git a/web/lib/firebase/contracts.ts b/web/lib/firebase/contracts.ts
index 362d8139..ad2a4348 100644
--- a/web/lib/firebase/contracts.ts
+++ b/web/lib/firebase/contracts.ts
@@ -18,7 +18,7 @@ import _ from 'lodash'
 import { app } from './init'
 import { getValues, listenForValue, listenForValues } from './utils'
 import { Binary, Contract, FullContract } from '../../../common/contract'
-import { getProbability } from '../../../common/calculate'
+import { getProbability } from '../../../common/calculate-dpm'
 import { createRNG, shuffle } from '../../../common/util/random'
 import { getCpmmProbability } from '../../../common/calculate-cpmm'
 export type { Contract }
diff --git a/web/pages/api/v0/_types.ts b/web/pages/api/v0/_types.ts
index 44a6119e..f793813e 100644
--- a/web/pages/api/v0/_types.ts
+++ b/web/pages/api/v0/_types.ts
@@ -1,5 +1,5 @@
 import { Bet } from '../../../../common/bet'
-import { getProbability } from '../../../../common/calculate'
+import { getProbability } from '../../../../common/calculate-dpm'
 import { Comment } from '../../../../common/comment'
 import { Contract } from '../../../../common/contract'
 
diff --git a/web/pages/make-predictions.tsx b/web/pages/make-predictions.tsx
index 37872c39..c4e298fa 100644
--- a/web/pages/make-predictions.tsx
+++ b/web/pages/make-predictions.tsx
@@ -3,7 +3,7 @@ import dayjs from 'dayjs'
 import Link from 'next/link'
 import { useState } from 'react'
 import Textarea from 'react-expanding-textarea'
-import { getProbability } from '../../common/calculate'
+import { getProbability } from '../../common/calculate-dpm'
 import { parseWordsAsTags } from '../../common/util/parse'
 import { AmountInput } from '../components/amount-input'
 import { InfoTooltip } from '../components/info-tooltip'