Free Tool · Betting Math
Bet Payout Calculator
Enter your odds and stake to see the exact payout, profit, and implied probability of a single bet.
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Bet Return
$200.00Total Payout
+$100.00Profit
50.0%Implied Prob
+100American Odds
1/1Fractional Odds
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Parlay Calculator→Combine multiple bets into one parlay and see the combined odds, total payout, and implied probability.Odds Converter→Convert betting odds between American, decimal, and fractional formats, and see the implied probability.Expected Value Calculator→Estimate the expected value of a bet from your win probability and the offered odds.No-Vig Fair Odds Calculator→Remove the sportsbook's margin from a two-way market to get the fair odds and fair probability.Arbitrage Calculator→Check whether two prices form an arbitrage and get the stake split for a positive return on every outcome.Kelly Criterion Calculator→Find the bankroll-optimal stake from your win probability and the odds, with fractional-Kelly options.
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