Free calculator
Arbitrage Calculator
Find guaranteed profit when odds create an arbitrage opportunity.
Calculator inputs
Updates as you type
How the arbitrage calculator works
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 risk-free profit remains, then splits your total stake across the outcomes so each pays the same.
Frequently asked questions
How do I know if odds create an arbitrage?
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.
How much profit does an arbitrage bet make?
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.
What stake should I place on each outcome?
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.