Betting Mathematics
Kelly Criterion Calculator
Calculate full, half and quarter Kelly stakes from bankroll, odds and estimated win probability.
Open calculator →Phase 2: These calculators run entirely in the browser and require no server-side software.
Betting Mathematics
Expected Value Calculator
Calculate expected value, expected ROI, fair odds and break-even probability.
Open calculator →Betting Basics
Odds Converter
Convert American, decimal and fractional odds and see the implied probability.
Open calculator →Betting Mathematics
Overround and No-Vig Calculator
Calculate sportsbook margin and remove the vig from two-way, three-way or custom markets.
Open calculator →Advanced Betting
Arbitrage Calculator
Check whether prices create an arbitrage and calculate the stake split for equal returns.
Open calculator →Betting Basics
Parlay Calculator
Combine multiple decimal prices and calculate total odds, return, profit and implied probability.
Open calculator →Professional Betting
Closing Line Value Calculator
Compare your betting price with the closing price and calculate CLV.
Open calculator →Horse Racing Tools
Dutching Calculator
Split a total stake across several selections to target an equal payout.
Open calculator →Betting Exchange Tools
Lay Betting Calculator
Calculate liability, gross winnings, commission and net profit for an exchange lay bet.
Open calculator →Betting Exchange Tools
Betting Exchange Commission Calculator
Calculate exchange commission and net winnings from a profitable market.
Open calculator →Horse Racing Tools
Each-Way Betting Calculator
Calculate potential returns when a horse wins or only places.
Open calculator →Soccer Betting Tools
Asian Handicap Settlement Calculator
Settle whole, half and quarter-goal Asian handicap bets.
Open calculator →Betting Mathematics
Probability and Edge Calculator
Compare an observed or estimated win rate with the probability implied by sportsbook odds.
Open calculator →Advanced Betting
Cash-Out Comparison Calculator
Compare a sportsbook cash-out offer with an approximate hedge-based value.
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