Calculators

The Kelly Criterion is a formula that tells you how much of your bankroll to stake on positive value bets to maximise long-term growth. It depends on two things: the chance of the bet winning and the odds you’re getting. Generally, the more mispriced a bet is in your favour, the more you should bet on it.

No. Our software does the Kelly sizing for you, so there’s no pencil, spreadsheet, or calculator needed. Just place the positive value bets at the stake size we provide, which is based on your bankroll.

Not necessarily. We already compute Kelly inside the Positive Value tool—keep your bankroll up to date and you’ll be fine without knowing the math. That said, understanding Kelly does help your intuition for why optimal bet sizing works the way it does.