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Arbitrage Sports Betting Calculator — PolyArb Guide

An arbitrage sports betting calculator tells you when market prices let you buy every outcome for less than $1.00, revealing a mathematical edge. On Polymarket that means summing best-asks across outcomes and comparing to $1.00. A calculator automates that check, factors fees and tick sizes, and shows your expected profit before you place orders. PolyArb integrates a live calculator into its bot, with alerts and execution to capture those edges.

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How an arbitrage sports betting calculator works

A calculator converts each outcome price into the share cost and sums them. If the total is below $1.00 the difference is the nominal edge. Practical calculators also subtract fees, include tick-size rounding, and model partial fills or slippage. That turns a theoretical gap into an actionable profit estimate you can trade against the CLOB.

Calculators must track the best-ask for each leg in real time. On Polymarket you can read order-book snapshots from the CLOB API or subscribe via the Market WebSocket. Timely data is essential because spreads often last seconds to minutes on liquid markets.

Using a calculator for Polymarket intra-market arbitrage

For a binary market the calculator checks bestAsk(YES)+bestAsk(NO). For multi-outcome it sums best-asks for all outcomes; if the sum is under $1.00 you can buy a complete set via CTF split/merge mechanics and lock the difference. Remember to factor taker fees and tick-size rounding into the final edge.

Never call the trade risk-free without listing risks. Resolution risk (UMA disputes), settlement timing, partial fills and slippage, fee changes, and smart-contract risk can reduce or delay profits. A good calculator reports both gross and net edge and flags markets where the trade size exceeds visible depth.

Why PolyArb’s calculator and bot matter

PolyArb bundles a live arbitrage calculator with an execution engine tuned for Polymarket. The service is non-custodial, runs today, and includes Telegram and Discord alerts so you can act on spreads immediately. PolyArb’s product claims 40ms latency versus ~800ms for free bots and a $7.62 minimum guaranteed edge per trade, helping you capture short-lived opportunities more reliably.

PolyArb costs $99/month and focuses on intra-Polymarket arbitrage rather than cross-platform comparisons. If you’re comparing to other venues like Kalshi or PredictIt, note those are separate exchanges with different mechanics; PolyArb targets Polymarket’s CLOB and CTF flows specifically.

Practical setup and best practices

Connect a Polygon wallet (Proxy or Gnosis Safe) and ensure you hold pUSD for trades; Polymarket sponsors gas via its Relayer. Use the calculator to size fills against visible liquidity and set conservative quantity limits to avoid partial fills. Monitor tick-size changes near price extremes (tick size can tighten to $0.001) because rounding can flip a small edge.

Treat calculator outputs as estimates. Always confirm on-chain order-book state before placing large trades, and keep alerts enabled so you can cancel or adjust if market conditions change.

Start capturing Polymarket edges with PolyArb

Subscribe to PolyArb for $99/month to get the integrated arbitrage calculator, 40ms execution, $7.62 minimum guaranteed edge, and real-time Telegram and Discord alerts.

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FAQ

What inputs does an arbitrage sports betting calculator need?
It needs the best-ask prices for every outcome, taker fee rates, tick size, and desired trade size or max depth. With those it computes gross and net edges and expected fills.
Can a calculator guarantee profit on Polymarket?
No tool can guarantee profit unconditionally. Calculators show a mathematical edge, but risks like UMA disputes, slippage, partial fills, fee changes, and settlement timing can affect outcomes.
How fast must a calculator update for effective arbitrage?
Sub-second updates are ideal on liquid markets because spreads can disappear in seconds. PolyArb advertises ~40ms latency, which helps capture short-lived opportunities compared with much slower free alternatives.
Does PolyArb work with multi-outcome markets?
Yes. PolyArb’s calculator sums best-asks across all outcomes and factors fees and tick-size rounding so you can evaluate buying a complete set via CTF operations.

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