Surebet (Arbitrage) Calculator

Split your stake across two bookmakers when the odds create a surebet. Check arb %, guaranteed return and profit in seconds.

Two-way arbitrage calculator

Enter your total stake and decimal odds for each side of the market. The calculator will tell you how much to place on each outcome and whether it is a true surebet.

The total amount of money you want to risk across both bookmakers.
Used only for displaying stakes and returns. Calculations are currency-agnostic.
Decimal odds for the first outcome, e.g. 2.10.
Decimal odds for the second outcome, e.g. 2.20.
Optional label to remember which side you are betting on.
Optional label for the opposite side of the market.

Frequently Asked Questions

Arb % is based on the sum of the implied probabilities from both odds. If 1/odds1 + 1/odds2 is less than 1, the difference (in %) shows your theoretical edge.

No. In practice, limits, delays, voided bets and rule changes can all affect your results. The calculator only shows theoretical numbers.

You can, but live odds move very quickly. Always be aware that one side of the bet may change or be suspended before you can place both bets.