Arbitrage Calculator
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How does the Arbitrage Calculator work?
Arbitrage betting (or "arbing") is a mathematically guaranteed way to lock in a profit regardless of the outcome of a sporting event. This happens when different bookmakers offer differing odds on the same event, creating a gap where the implied probability is less than 100%. Our Arbitrage Calculator helps you find the exact stakes needed to guarantee this profit.
Example of Arbitrage Betting
Imagine an upcoming Premier League match between Arsenal and Chelsea.
Bookmaker A offers odds of 2.10 (11/10) for Arsenal to win (Draw No Bet).
Bookmaker B offers odds of 2.05 (21/20) for Chelsea to win (Draw No Bet).
If you have a total bankroll of £100 to stake, the calculator determines how to split it to ensure equal profit:
- Stake £49.40 on Arsenal at 2.10 (11/10)
- Stake £50.60 on Chelsea at 2.05 (21/20)
No matter who wins, your return will be £103.73. Since your total stake was £100, you have locked in a guaranteed risk-free profit of £3.73 (a 3.73% return on investment).
Frequently Asked Questions
What is an arbitrage opportunity?
An arbitrage opportunity arises when bookmakers have opposing views on an outcome, or when one bookmaker is slow to update their odds. By covering all possible outcomes across different bookmakers, you guarantee a profit.
Can bookmakers ban me for arbing?
Yes. Bookmakers do not like arbitrage bettors because they only take profitable bets. If a bookmaker suspects you are consistently beating their closing line or exclusively betting on arbs, they may restrict your stakes (gubbing) or close your account.
What is implied probability?
Implied probability is the conversion of betting odds into a percentage chance of an outcome happening. If the combined implied probabilities of all possible outcomes in a market add up to less than 100%, an arbitrage opportunity exists.