Arbitrage calculator
When two books disagree enough on a market, backing both sides returns the same amount either way — the maths is exact, and getting both bets down at those prices is the hard part. Enter the best price on each side and we'll tell you if there's an arb — and exactly how to split your stake.
Arbitrage Finder
Two books · best price each side
Return either way
the same return either way, if both bets land at these prices
Arbitrage — the two prices leave a gap
+3.44%return on total stake
Stake on A
$47.02
Stake on B
$52.98
Return either way
$103.44
Profit
$3.44
How arbitrage works
Convert each side to its implied probability and add them up. If the total is under 100%, the combined payout beats your combined stake — a locked-in edge. Stake each side in proportion to its implied probability and you win the same amount whichever way it lands. Arbs are usually small and short-lived, which is why fast line-shopping (the best number across every book we price — what our bet slip surfaces) matters.
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