AISportsPlaysArbitrage Calculator
Enter the odds two different sportsbooks are offering on the two sides of the same market to check for a risk-free opportunity, and see exactly how to split a stake across both. No login required.
What sports arbitrage is
Different sportsbooks occasionally disagree enough on a price that staking both sides at two different books — rather than the same book — guarantees a profit no matter which side wins. That only works when the two implied probabilities, added together, come out under 100%. Most of the time they add up to a bit over 100% (that's the normal state, reflecting each book's own margin), which means there's no risk-free split available.
How to use it
Enter the odds for each side from the two different books, plus how much total you want to put in. The tool checks whether an opportunity actually exists and, if so, how to split the stake across both sides so the profit is identical regardless of outcome.
Worth knowing before trying this for real
Real arbitrage opportunities are rare, usually small, and can disappear in the time it takes to place the second side if a line moves. Some books also limit or close accounts that stake this way repeatedly. This tool checks the math honestly either way — most of the time it'll correctly tell you there's nothing here.
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