Calculators

Free odds calculator and converter: switch between American, decimal and fractional odds and see implied probability, total return and net profit.

Free bookmaker margin and no-vig calculator: enter the odds of a market and get the margin, the no-margin probability and the fair odds of each outcome.

Free parlay and accumulator calculator: multiply the decimal odds of each leg and get combined odds, implied probability, total return and net profit.

Expected value calculator: compare your estimated probability with the one in the odds and get the difference, expected value and fair odds.

Kelly criterion calculator: work out the stake for a fixed percentage of your bankroll and the fraction Kelly suggests for your estimated probability.

Free dutching calculator: split a total amount across several outcomes of one event to equalise the return and see the net result.

Free arbitrage (surebet) calculator: check whether odds from several operators leave a positive gap and split the amount to equalise the return.

Free hedge bet calculator: work out how much to stake on the opposite outcome to equalise the return, and the minimum hedge odds for no loss.

Target profit calculator: work out the stake needed at decimal odds to reach a chosen net profit if the bet wins, with total return and implied probability.