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Calculators
Fifteen calculators for pricing, value and building bets. Every one is free, on every plan.
Odds and pricing
Odds converter
Move between American odds, probability, cents, decimal, and fractional formats while checking profit and payout.
Implied probability
Translate a sportsbook price into the win rate required to break even.
Prediction markets
Compare a contract price in cents with equivalent sportsbook odds and decimal pricing.
No-vig fair odds
Remove the market margin from both sides to estimate fair probabilities and prices.
Hold
Measure the overround across a two-way market using the best available price on each side.
Vig
See how much pricing margin is embedded in a two-sided sportsbook market.
Value and bankroll
Expected value
Put a dollar value on your edge using stake, offered odds, and your fair win probability.
Kelly sizing
Turn bankroll, price, and conviction into a disciplined fractional-Kelly stake.
Bonus bet
Find the opposing stake that converts a stake-not-returned bonus bet into predictable cash.
Bet construction
Arbitrage and hedge
Enter odds and stakes for both outcomes to see arb percentage, payouts, and profit on either result.
Parlay
Combine leg prices to see the true parlay odds, implied probability, profit, and payout.
Round robin
Count every parlay combination, total risk, maximum return, and a simulated result.
Market models
Half-point value
Estimate the fair price after buying or selling half a point, with extra weight on key numbers.
Spread to moneyline
Convert a point spread into estimated fair moneyline prices using a league-specific model.
Poisson
Estimate exact, at-least, and at-most outcomes from an expected event average.
