Betting calculators & tools
Whether you are learning the basics or sharpening your edge — use our free tools to calculate fair odds, find optimal stakes, check expected value, and simulate your betting strategy.
Variance simulator
Run Monte Carlo simulations to understand betting variance. See risk of ruin, expected drawdowns, and profit distribution across thousands of scenarios.
Fair odds calculator
Remove the bookmaker margin to reveal the true fair odds and real probability of each outcome. Supports 2-way, 3-way, and custom markets.
Kelly criterion calculator
Calculate the mathematically optimal stake for any bet. Compare full Kelly, half Kelly, and quarter Kelly strategies with expected growth rates.
Odds converter
Convert between decimal, American, fractional, implied probability, Hong Kong, Malay, and Indonesian odds formats instantly.
Expected value (EV) calculator
Calculate the expected value and edge percentage of any bet to determine if it offers long-term positive value.
Accumulator calculator
Calculate combined odds, potential payout, and implied probability for accumulators and parlays with up to 20 selections.
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