Arbitrage Betting Calculator

This calculator works for any standard sports betting arbitrage (also known as a sure bet). Here's the process:

1. Select 2-Way for head-to-head, over/under, or yes/no markets, or 3-Way for soccer, boxing, or any market with a draw option.
2. Enter the decimal odds for each outcome from their respective bookmakers.
3. Optionally enter the bookmaker name for each outcome to keep track.
4. Enter your total stake — the calculator distributes this optimally across all bets.
5. If the implied probability sum is under 100%, you have a genuine arbitrage opportunity. Hit Copy to paste the bet details wherever you need.

For a set of outcomes with decimal odds O₁, O₂, ... Oₙ, the implied probability sum is:

If Sum < 1.0, an arbitrage exists. The guaranteed profit percentage is:

The optimal stake for each outcome is proportional to its implied probability:

This ensures the payout is identical regardless of which outcome wins — locking in your guaranteed profit.

Speed matters. Arb opportunities typically last minutes to seconds before bookmakers adjust. Having accounts funded and ready at multiple books is essential.

Account management is critical. Bookmakers may limit or close accounts that consistently exploit arbitrage. Using realistic stakes, avoiding round numbers, and varying your betting patterns can extend account longevity.

Check settlement rules before betting. Some bookmakers use different rules for pushes, abandoned events, or player markets. A profitable-looking arb can become a loss if one side voids and the other doesn't.

Verify the market is identical. "Team A to win" vs "Team A −0 handicap" may look the same but settle differently. Always confirm you're betting on the exact same market at each book.