Betting calculators
Tools that show what a price really means — whether a boost beats the fair price, the payout, the break-even win rate, the sportsbook's cut and whether a bet is worth it. Free, no account, works on your phone.
Boost & parlay checkPick the legs of a parlay or an odds boost from this week's NFL, college football and MLB games, type in what the sportsbook is offering, and see the market's fair price for the same legs — and how much of the payout the book is keeping, or giving away.Open →Parlay calculatorEnter each leg's American odds and your stake: the parlay's payout, its combined odds, the break-even hit rate, and how much of the price is the sportsbook's cut compounding leg by leg.Open →Odds converterConvert betting odds between American (moneyline), decimal and fractional formats and see the implied probability — the win rate a bet needs to break even.Open →No-vig fair odds calculatorEnter both sides of a market. The calculator removes the sportsbook's cut (the vig, or hold) and shows each side's fair probability and fair odds, plus the hold percentage the book is charging.Open →Expected value (EV) calculatorEnter the odds and your estimated win probability to see the bet's expected value per dollar, the break-even win rate, and a conservative quarter-Kelly stake.Open →
Want the probability side done for you?
A calculator tells you what a price needs. Our model estimates what the game will actually do — every NFL game priced against ten sportsbooks, one pick free each week, every pick graded in public.
For information only. No calculator, model or pick guarantees a profit; bet only what you can afford to lose. 21+ and only where sports betting is legal. Gambling problem? 1-800-GAMBLER.