diff --git a/web/components/bets-list.tsx b/web/components/bets-list.tsx
index 1eae2c53..8a9f816c 100644
--- a/web/components/bets-list.tsx
+++ b/web/components/bets-list.tsx
@@ -14,7 +14,11 @@ import {
 } from '../lib/util/format'
 import { Col } from './layout/col'
 import { Spacer } from './layout/spacer'
-import { Contract, getContractFromId, path } from '../lib/firebase/contracts'
+import {
+  Contract,
+  getContractFromId,
+  contractPath,
+} from '../lib/firebase/contracts'
 import { Row } from './layout/row'
 import { UserLink } from './user-page'
 import {
@@ -130,7 +134,7 @@ function MyContractBets(props: { contract: Contract; bets: Bet[] }) {
       <Row className="flex-wrap gap-4">
         <Col className="flex-[2] gap-1">
           <Row className="mr-6">
-            <Link href={path(contract)}>
+            <Link href={contractPath(contract)}>
               <a
                 className="font-medium text-indigo-700 hover:underline hover:decoration-indigo-400 hover:decoration-2"
                 onClick={(e) => e.stopPropagation()}
diff --git a/web/components/contract-card.tsx b/web/components/contract-card.tsx
index 4571ab9e..d902b80d 100644
--- a/web/components/contract-card.tsx
+++ b/web/components/contract-card.tsx
@@ -4,7 +4,11 @@ import { Row } from '../components/layout/row'
 import { formatMoney } from '../lib/util/format'
 import { UserLink } from './user-page'
 import { Linkify } from './linkify'
-import { Contract, compute, path } from '../lib/firebase/contracts'
+import {
+  Contract,
+  contractMetrics,
+  contractPath,
+} from '../lib/firebase/contracts'
 import { Col } from './layout/col'
 import { parseTags } from '../lib/util/parse'
 import dayjs from 'dayjs'
@@ -15,10 +19,10 @@ export function ContractCard(props: {
 }) {
   const { contract, showHotVolume } = props
   const { question, resolution } = contract
-  const { probPercent } = compute(contract)
+  const { probPercent } = contractMetrics(contract)
 
   return (
-    <Link href={path(contract)}>
+    <Link href={contractPath(contract)}>
       <a>
         <li className="col-span-1 bg-white hover:bg-gray-100 shadow-md rounded-lg divide-y divide-gray-200">
           <div className="card">
@@ -98,7 +102,7 @@ export function AbbrContractDetails(props: {
 }) {
   const { contract, showHotVolume } = props
   const { volume24Hours } = contract
-  const { truePool } = compute(contract)
+  const { truePool } = contractMetrics(contract)
 
   return (
     <Col className={clsx('text-sm text-gray-500 gap-2')}>
@@ -122,7 +126,7 @@ export function AbbrContractDetails(props: {
 export function ContractDetails(props: { contract: Contract }) {
   const { contract } = props
   const { question, description, closeTime } = contract
-  const { truePool, createdDate, resolvedDate } = compute(contract)
+  const { truePool, createdDate, resolvedDate } = contractMetrics(contract)
 
   const tags = parseTags(`${question} ${description}`).map((tag) => `#${tag}`)
 
@@ -169,7 +173,7 @@ export function ContractDetails(props: { contract: Contract }) {
 // String version of the above, to send to the OpenGraph image generator
 export function contractTextDetails(contract: Contract) {
   const { question, description, closeTime } = contract
-  const { truePool, createdDate, resolvedDate } = compute(contract)
+  const { truePool, createdDate, resolvedDate } = contractMetrics(contract)
 
   const tags = parseTags(`${question} ${description}`).map((tag) => `#${tag}`)
 
diff --git a/web/components/contract-feed.tsx b/web/components/contract-feed.tsx
index c6f31d1a..0a317c82 100644
--- a/web/components/contract-feed.tsx
+++ b/web/components/contract-feed.tsx
@@ -17,9 +17,9 @@ import dayjs from 'dayjs'
 import relativeTime from 'dayjs/plugin/relativeTime'
 import { OutcomeLabel } from './outcome-label'
 import {
-  compute,
+  contractMetrics,
   Contract,
-  path,
+  contractPath,
   updateContract,
 } from '../lib/firebase/contracts'
 import { useUser } from '../hooks/use-user'
@@ -201,7 +201,7 @@ export function ContractDescription(props: {
 
 function FeedQuestion(props: { contract: Contract }) {
   const { contract } = props
-  const { probPercent } = compute(contract)
+  const { probPercent } = contractMetrics(contract)
 
   return (
     <>
@@ -218,7 +218,10 @@ function FeedQuestion(props: { contract: Contract }) {
           <Timestamp time={contract.createdTime} />
         </div>
         <Row className="justify-between gap-4 mb-2">
-          <SiteLink href={path(contract)} className="text-xl text-indigo-700">
+          <SiteLink
+            href={contractPath(contract)}
+            className="text-xl text-indigo-700"
+          >
             {contract.question}
           </SiteLink>
           <ResolutionOrChance
diff --git a/web/components/contract-overview.tsx b/web/components/contract-overview.tsx
index 0bfb4909..0574aad9 100644
--- a/web/components/contract-overview.tsx
+++ b/web/components/contract-overview.tsx
@@ -1,8 +1,8 @@
 import {
-  compute,
+  contractMetrics,
   Contract,
   deleteContract,
-  path,
+  contractPath,
 } from '../lib/firebase/contracts'
 import { Col } from './layout/col'
 import { Spacer } from './layout/spacer'
@@ -22,7 +22,7 @@ export const ContractOverview = (props: {
 }) => {
   const { contract, className } = props
   const { resolution, creatorId, creatorName } = contract
-  const { probPercent, truePool } = compute(contract)
+  const { probPercent, truePool } = contractMetrics(contract)
 
   const user = useUser()
   const isCreator = user?.id === creatorId
@@ -35,7 +35,7 @@ export const ContractOverview = (props: {
       ? `Resolved ${resolution}!`
       : `Resolved ${resolution} by ${creatorName}:`
     : `Currently ${probPercent} chance, place your bets here:`
-  const url = `https://manifold.markets${path(contract)}`
+  const url = `https://manifold.markets${contractPath(contract)}`
   const tweetText = `${tweetQuestion}\n\n${tweetDescription}\n\n${url}`
 
   return (
diff --git a/web/components/contracts-list.tsx b/web/components/contracts-list.tsx
index 1a3765b0..c76fa72d 100644
--- a/web/components/contracts-list.tsx
+++ b/web/components/contracts-list.tsx
@@ -3,7 +3,11 @@ import Link from 'next/link'
 import clsx from 'clsx'
 import { useEffect, useState } from 'react'
 
-import { compute, Contract, listContracts } from '../lib/firebase/contracts'
+import {
+  contractMetrics,
+  Contract,
+  listContracts,
+} from '../lib/firebase/contracts'
 import { User } from '../lib/firebase/users'
 import { Col } from './layout/col'
 import { SiteLink } from './site-link'
@@ -189,7 +193,9 @@ export function SearchableGrid(props: {
   if (sort === 'newest' || sort === 'resolved' || sort === 'all') {
     matches.sort((a, b) => b.createdTime - a.createdTime)
   } else if (sort === 'most-traded') {
-    matches.sort((a, b) => compute(b).truePool - compute(a).truePool)
+    matches.sort(
+      (a, b) => contractMetrics(b).truePool - contractMetrics(a).truePool
+    )
   } else if (sort === 'creator' || sort === 'tag') {
     matches.sort((a, b) => b.volume7Days - a.volume7Days)
   }
diff --git a/web/lib/firebase/contracts.ts b/web/lib/firebase/contracts.ts
index 2fd8e786..8a48843d 100644
--- a/web/lib/firebase/contracts.ts
+++ b/web/lib/firebase/contracts.ts
@@ -18,24 +18,36 @@ import {
 import { app } from './init'
 import { getValues, listenForValues } from './utils'
 import { Contract } from '../../../common/contract'
+import { getProbability } from '../../../common/calculate'
 export type { Contract }
 
-export function path(contract: Contract) {
+export function contractPath(contract: Contract) {
   // For now, derive username from creatorName
   return `/${contract.creatorUsername}/${contract.slug}`
 }
 
-export function compute(contract: Contract) {
-  const { pool, startPool, createdTime, resolutionTime, isResolved } = contract
-  const truePool = pool.YES + pool.NO - startPool.YES - startPool.NO
-  const prob = pool.YES ** 2 / (pool.YES ** 2 + pool.NO ** 2)
+export function contractMetrics(contract: Contract) {
+  const {
+    pool,
+    startPool,
+    totalShares,
+    createdTime,
+    resolutionTime,
+    isResolved,
+  } = contract
+
+  const truePool = pool.YES + pool.NO
+  const prob = getProbability(totalShares)
   const probPercent = Math.round(prob * 100) + '%'
-  const startProb =
-    startPool.YES ** 2 / (startPool.YES ** 2 + startPool.NO ** 2)
+
+  const startProb = getProbability(startPool)
+
   const createdDate = dayjs(createdTime).format('MMM D')
+
   const resolvedDate = isResolved
     ? dayjs(resolutionTime).format('MMM D')
     : undefined
+
   return { truePool, probPercent, startProb, createdDate, resolvedDate }
 }
 
diff --git a/web/pages/[username]/[contractSlug].tsx b/web/pages/[username]/[contractSlug].tsx
index 6dc7629b..30092509 100644
--- a/web/pages/[username]/[contractSlug].tsx
+++ b/web/pages/[username]/[contractSlug].tsx
@@ -12,7 +12,7 @@ import { Title } from '../../components/title'
 import { Spacer } from '../../components/layout/spacer'
 import { User } from '../../lib/firebase/users'
 import {
-  compute,
+  contractMetrics,
   Contract,
   getContractFromSlug,
 } from '../../lib/firebase/contracts'
@@ -58,7 +58,7 @@ export default function ContractPage(props: {
     !isResolved && (!contract.closeTime || contract.closeTime > Date.now())
   const allowResolve = !isResolved && isCreator && !!user
 
-  const { probPercent } = compute(contract)
+  const { probPercent } = contractMetrics(contract)
 
   const description = resolution
     ? `Resolved ${resolution}. ${contract.description}`
diff --git a/web/pages/create.tsx b/web/pages/create.tsx
index 7e00191b..c4f0de27 100644
--- a/web/pages/create.tsx
+++ b/web/pages/create.tsx
@@ -8,7 +8,7 @@ import { CreatorContractsList } from '../components/contracts-list'
 import { Spacer } from '../components/layout/spacer'
 import { Title } from '../components/title'
 import { useUser } from '../hooks/use-user'
-import { Contract, path } from '../lib/firebase/contracts'
+import { Contract, contractPath } from '../lib/firebase/contracts'
 import { Page } from '../components/page'
 import { AdvancedPanel } from '../components/advanced-panel'
 import { createContract } from '../lib/firebase/api-call'
@@ -73,7 +73,7 @@ export default function NewContract() {
       return
     }
 
-    await router.push(path(result.contract as Contract))
+    await router.push(contractPath(result.contract as Contract))
   }
 
   const descriptionPlaceholder = `e.g. This market will resolve to “Yes” if, by June 2, 2021, 11:59:59 PM ET, Paxlovid (also known under PF-07321332)...`
diff --git a/web/pages/make-predictions.tsx b/web/pages/make-predictions.tsx
index c2a2fe5f..31a947d9 100644
--- a/web/pages/make-predictions.tsx
+++ b/web/pages/make-predictions.tsx
@@ -10,7 +10,11 @@ import { Page } from '../components/page'
 import { Title } from '../components/title'
 import { useUser } from '../hooks/use-user'
 import { createContract } from '../lib/firebase/api-call'
-import { compute, Contract, path } from '../lib/firebase/contracts'
+import {
+  contractMetrics,
+  Contract,
+  contractPath,
+} from '../lib/firebase/contracts'
 
 type Prediction = {
   question: string
@@ -20,12 +24,12 @@ type Prediction = {
 }
 
 function toPrediction(contract: Contract): Prediction {
-  const { startProb } = compute(contract)
+  const { startProb } = contractMetrics(contract)
   return {
     question: contract.question,
     description: contract.description,
     initialProb: startProb * 100,
-    createdUrl: path(contract),
+    createdUrl: contractPath(contract),
   }
 }