Free betting calculators
Work out what a promo or a price is worth. No account, no card, nothing to install.
Promos and boosts
Profit boost calculator: is the boost worth it?
Enter your odds and a 25%, 50%, or 100% profit boost to see the boosted price and what the bet is worth. A 50% boost on +150 plays like +225.
50% profit boostOpen calculator+150plays like+225
Worth +$9.14on a $25 bet with a 42.0% fair chance.
Bonus bet converter
Turn a bonus bet into locked-in cash by hedging the other side at another book.
A $50 bonus bet at +300 locks in$33.33
No-sweat bet calculator
What a "no sweat" or second-chance bet is worth when a loss comes back as a bonus bet.
$100 at +120, refunded if it loses, is worth$33.03
Bet and get calculator (bet $5, get $200)
What a "bet $5, get $200 in bonus bets" offer is worth, whether the bonus is guaranteed or only paid when your bet wins.
Bet $5, get $200 in bonus bets if it wins, is worth$58.45
Odds boost calculator
Is a boosted price (say +150 to +200) actually better than the fair price?
$25 at a boosted +200, fair price +138, is worth$6.51
Parlay insurance calculator
What a parlay is worth when the book refunds your stake as a bonus bet if exactly one leg loses.
A $25 parlay of three -110 legs, insured, is worth$3.28
Price a bet
Find the fair chance, then see how your book's price compares.
Expected value calculator
What a bet is worth on average, from your book's odds and the fair chance it wins.$100 at +150, fair price +138, earns+$5.04De-vig calculator
Take the vig out of a two-sided price to get the fair chance and the book's hold.At -150 and +130, the book's hold is3.4%Closing line value calculator
Compare the odds you bet with the closing line to see whether you beat the market, and by how much.+150 beats a +130 / -150 close by+2.0 pointsOdds converter
Convert American, decimal, and fractional odds, and see the chance each price implies.-110 in decimal odds is1.91Parlay calculator
What a parlay pays: its total odds, payout, and the chance the book's price implies.Three -110 legs pay+596Round robin calculator
How many parlays a round robin makes, what it costs, and what you finish with for each number of winning legs.Four -110 legs in $10 pairs win up to$158.68
Size and hedge
How much to stake, and how to lock in a result.
Kelly criterion calculator
How much of your bankroll a bet with an edge deserves, with a fraction and a cap.A 42.0% chance at -105 has no edge, so the stake is$0.00Hedge bet calculator
How much to bet on the other side to lock in the same profit whichever way it goes.$25 at +600, hedged at -150, locks in$45.00Arbitrage calculator
How to split a stake across two books so both sides pay the same, and whether the prices leave a profit.$100 split across +110 and +105 locks in$3.73
Fair odds for today’s games
The fair moneyline, spread, and total for every upcoming NFL, college football, NBA, and NHL game, ready to compare with a price at your book.
See today’s fair odds