Arb Cruncher is a free online sports betting calculator that calculates level-profit stakes for arbitrage betting, trading and back and lay bets on betting exchanges. This back and lay calculator can be used for arbitrage calculations and for working out stakes for arbitrage betting calculations. Arb Cruncher is the most popular online betting calculator.

The live online calculator is shown below and is also available in a convenient popup window.

To work out the calculations used for cross market arbitrage betting use the free cross arbitrage calculator tool.