Arbitrage CALCULATOR Quick Links Welcome to the arbitrage calculator website. We have built all the tools you need to make your sports betting (and specifically your arb) experience better! You old arber you! Below we have an arbitrage calculator and also some more information about arbitrages in general. How does the arbitrage calculator work? Our arbitrage calculator allows you to enter the odds of two (or more) different bets to detetmine how much you should stake on each to guarantee a profit.