Free betting tools
Arbitrage Calculator
Check whether odds across books create an arbitrage and split your stake.
Odds format
Outcomes
Enter valid odds and values to see the result.
Frequently asked questions
What is arbitrage betting?
Arbitrage means backing every outcome of an event at different books where the combined implied probability is below 100%, so the return is the same whatever happens.
How are arbitrage stakes calculated?
Each stake = total stake × (1 ÷ odds) ÷ the sum of 1 ÷ odds across all outcomes. Every outcome then pays the same amount.
Is arbitrage risk-free?
Not entirely. Odds can change before you place every bet, and sportsbooks may limit accounts or void bets. Always confirm prices first.
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For information only. These calculators do not guarantee profit. 18+. Bet responsibly.