Sports Betting Calculators

Free tools to price a bet before you place it: parlay payout, fair odds without the vig, expected value and bet sizing. No sign-up.

Payout, odds and the chance a parlay hits, up to 15 legs.

Remove the sportsbook's margin to get fair odds and true probabilities.

How much of your bankroll to bet when you have an edge.

Expected value of a bet from the odds and your win probability.

Which calculator do I need?

Several bets in one ticket? The parlay calculator gives the payout and the chance it hits.
Want the real chance behind the odds? The no-vig calculator removes the sportsbook's margin.
Is this bet worth it? The EV calculator shows its expected value.
How much should I stake? The Kelly calculator sizes the bet from your edge.

$19.99 a sport, or $29.99 for all of them

7 days free · then from $19.99/month · cancel anytime