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Free calculator
Split stakes across outcomes and check the potential profit.
Calculator inputs
Updates as you type
Enter decimal odds above 1 for every outcome. Results assume all stakes are accepted and settled at those odds, before fees and rounding.
An arbitrage exists when the sum of implied probabilities across all outcomes drops below 100%. Enter the best available odds for every outcome and the calculator works out whether a theoretical profit remains, then splits your total stake across the outcomes so each pays the same.
Convert each outcome's odds to implied probability and add them up. If the total is under 100%, the market is arbable. The calculator shows this margin as soon as you enter the odds.
Typical arbs return 0.5 to 3 percent of total stake after all positions are filled. The calculator displays the exact return on turnover for the odds you enter.
Stake in proportion to the implied probabilities so every outcome returns the same amount. The calculator handles the split; rounding rules at each book can shift a few cents.