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Kelly Criterion Calculator
Find the mathematically optimal stake size for a bet where you have an edge.
The Kelly criterion maximises long-term bankroll growth by sizing stakes to your edge. Full Kelly is aggressive and high-variance — many bettors use half or quarter Kelly to smooth the swings while keeping most of the growth.
Frequently asked questions
The Kelly criterion is a formula that sizes your stake in proportion to your edge, maximising long-term bankroll growth. It tells you what fraction of your bankroll to bet given the odds and your win probability.
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Get the data behind every bet.
Go beyond the calculator with deep team & player stats — xG, shots, form, last-10 trends and player props — plus the model probability and expected value behind every line.