Kelly Criterion Calculator
Find the Kelly-optimal stake from your edge and the odds.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
This calculator applies the Kelly criterion to find the mathematically optimal fraction of a bankroll to stake on a favourable bet: f* = (bp − q) / b, where b is the net odds received on the bet, p is the probability of winning, and q (=1−p) is the probability of losing. The formula maximizes the long-run growth rate of capital while avoiding ruin.
Professional sports bettors, poker players, and quantitative traders use it to size positions consistently instead of betting a fixed or gut-feel amount, since over-betting even a genuine edge leads to ruin over time. Enter your estimated win probability and the odds offered to get the recommended stake as a percentage of bankroll.
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