Smart tools
Betting & Casino Calculators
Free, fast calculators for odds, probability, parlays, expected value, bankroll, bonuses, slots, roulette and poker. Everything runs in your browser — nothing you type is stored or sent anywhere.
Odds Converter
Convert decimal, fractional and American odds and see the implied probability.
Open calculatorImplied Probability & Margin Calculator
Turn odds into probabilities, measure the bookmaker margin and get fair odds.
Open calculatorParlay / Accumulator Calculator
Combine up to 20 selections and see combined odds, payout and the chance all legs win.
Open calculatorExpected Value (EV) Calculator
Compare your estimated win probability with the odds on offer.
Open calculatorKelly Criterion Calculator
Work out the Kelly stake for a given edge — full, half or quarter Kelly.
Open calculatorHedge Bet Calculator
Find the opposite-side stake that locks in the same return either way.
Open calculatorArbitrage (Sure Bet) Calculator
Check whether odds across bookmakers leave a gap and how to split the stake.
Open calculatorBet Payout & Profit Calculator
See your return, profit and break-even win rate for any stake and odds.
Open calculatorROI & Betting Results Calculator
Turn your betting record into profit, ROI, strike rate and average stake.
Open calculatorBonus Wagering Requirement Calculator
Estimate the turnover a bonus needs and what it is likely to cost in expected loss.
Open calculatorSlot RTP & Expected Loss Calculator
See the average cost of a session from bet size, spins and RTP.
Open calculatorRoulette Odds & House Edge Calculator
Win probability, payout and house edge for every roulette bet type.
Open calculatorPoker Pot Odds Calculator
Compare the price of a call with the equity your outs give you.
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