Calculators
Get the math right, every time.
Free, fully open sports betting calculators. No sign-in, no paywall — sign in only if you want to save defaults and get alerts.
Parlay Calculator
Combine any number of legs across American, decimal, or fractional odds.
Open calculator →Odds Converter
American ↔ decimal ↔ fractional ↔ implied probability.
Open calculator →Hedge Calculator
Lock in profit or limit risk on an open ticket.
Open calculator →Hold / Vig Calculator
See the book's vig on any market in seconds.
Open calculator →Expected Value
Compute true EV from your edge and the offered price.
Open calculator →Kelly Stake
Optimal stake sizing based on your edge and bankroll.
Open calculator →Arbitrage Calculator
Find guaranteed profit across two opposing books.
Open calculator →No-Vig Fair Odds
Strip the juice out of any two-way market.
Open calculator →Point Spread Converter
Convert spread to moneyline equivalents.
Open calculator →Poisson Calculator
Model game totals and goal-scoring rates.
Open calculator →Round Robin Calculator
Auto-build round-robin parlays and compute combined payout.
Open calculator →Half-Point Calculator
Price the cost of buying or selling half a point.
Open calculator →Bonus Bet Calculator
Maximize value from sportsbook bonus bets and free plays.
Open calculator →