Betting calculators
Free calculators that work with American odds: parlays and round robins, payouts, fair odds without the vig, hedging and bet sizing. Everything is worked out in your browser; nothing you type is sent anywhere.
Parlay calculatorOdds and payout for a parlay of up to 15 legs, with pushes.
Round robin calculatorEvery parlay in a round robin: how many bets, the risk and the payout.
Bet payout calculatorWhat a bet pays at American odds, or what to risk to win a set amount.
Odds converterAmerican, decimal and fractional odds and implied probability.
No-vig fair odds calculatorTake the vig out of a market: fair odds, fair win % and the hold.
Hedge calculatorHow much to bet on the other side to lock in a profit or get your stake back.
Expected value calculatorA bet's expected profit from the odds and your win probability.
Kelly criterion calculatorHow much of your bankroll the Kelly criterion says to bet.
Arbitrage calculatorStakes across two or three prices that pay the same whatever happens.
Closing line value calculatorHow the odds you took compare with the closing line.
Prediction market calculatorAny prediction market price as odds after its fee, next to a sportsbook's.