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Sports Betting Arbitrage Calculator for Polymarket Traders

If you searched for a sports betting arbitrage calculator, you want a quick, reliable way to spot complementary prices that sum below $1.00. On Polymarket that math is explicit: buy the full set of outcomes whose best-ask sum is less than $1.00 and capture the difference as edge. PolyArb automates that process on Polymarket markets, surfacing opportunities with millisecond speed and a $7.62 minimum guaranteed edge per trade. Remember that on-chain risks — resolution disputes, slippage, and settlement timing — still apply and should be managed.

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How a sports betting arbitrage calculator works

A calculator sums the best-ask prices for all mutually exclusive outcomes and subtracts that sum from $1.00 to show the edge. For binary markets the check is YES.ask + NO.ask < $1.00. For multi-outcome markets you add every outcome’s best ask. The result is the theoretical profit before fees and execution costs. Calculators are useful for spotting opportunities, but they don’t execute. Execution requires fast access to the CLOB, the ability to place Fill-And-Kill orders, and handling of CTF split/merge operations. That’s where an execution tool like PolyArb matters.

Why Polymarket needs a tailored calculator

Polymarket uses a Central Limit Order Book and ERC-1155 outcome tokens (CTF), so the calculator must read live best-ask quotes from the CLOB and account for tick size, which can tighten to $0.001 near price extremes. It must also consider maker/taker fee bands and whether a market is fee-free (for example, the Geopolitics category). A generic sports-arb calculator ignores these product specifics and can give misleading signals. PolyArb integrates Polymarket’s market mechanics and API behavior so the edge it reports is executable.

Execution, latency, and real costs

Edge on paper becomes profit only after both legs fill. Slippage, partial fills, taker fees, and UMA resolution disputes can erode or eliminate apparent profit. PolyArb reduces execution risk with 40ms routing (vs ~800ms for free bots), Telegram and Discord alerts, and non-custodial order routing through Polymarket’s relayer. The service is live today at $99/month and claims a $7.62 minimum guaranteed edge per trade; verify assumptions in each trade and never assume trades are unconditional risk-free winners.

How to use PolyArb with a calculator

Run the calculator to scan markets and flag edges; then use PolyArb to route the order, construct complete sets via CTF where needed, and monitor fills. Keep parameters conservative: set slippage tolerance, respect tick-size changes, and exclude geo-blocked markets if you’re in a restricted jurisdiction. PolyArb’s alerts and low latency turn calculator signals into actionable executions, but you remain responsible for monitoring resolution risk and compliance with Polymarket’s geographic rules.

Start catching arb before it vanishes

Try PolyArb today — $99/month, 40ms routing, Telegram + Discord alerts, non-custodial, and a $7.62 minimum guaranteed edge per trade. Sign up to convert calculator signals into live executions.

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FAQ

What inputs does a sports betting arbitrage calculator need?
It needs live best-ask prices for every mutually exclusive outcome, the market’s tick size, and the applicable taker fee. For Polymarket, integrate the CLOB book and account for CTF mechanics to convert paper edge into executable orders.
Is the calculator enough to guarantee profit?
No. The calculator finds mathematical edge, but execution risks remain: slippage, partial fills, fees, UMA disputes, and settlement timing. Tools like PolyArb reduce execution risk but do not eliminate these factors.
Can I use PolyArb with other platforms like Kalshi or PredictIt?
PolyArb focuses on intra-Polymarket arbitrage. Cross-platform arb (Kalshi, PredictIt, Manifold) is a different workflow with separate APIs and settlement rules; PolyArb is built to route orders through Polymarket’s CLOB and CTF.

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