Arbitrage calculator
When two books disagree enough on a market, you can back both sides and lock in profit no matter the result. 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
Locked-in return
guaranteed regardless of result
Arbitrage — locked-in profit
+3.44%return on total stake
Stake on A
$47.02
Stake on B
$52.98
Locked-in return
$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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