Arbitrage Calculator

Split a total stake across the best price on every outcome so the return is the same whichever result occurs.

Odds format: Decimal Fractional American

OutcomesOddsStake

Total stake $

Commission % (optional)

Guaranteed return

Profit

Amount

Percent

Arb margin

What this calculates

An arbitrage exists when the best available prices across bookmakers cover every outcome with a combined market margin below 100%. The calculator distributes your total stake so each outcome returns the same amount, and reports the guaranteed profit and margin. It flags when the combined margin is 100% or higher, meaning no arbitrage is present.