Home CA Rankings MLB NBA WNBA NFL NHL NCAAF CBB Tennis Golf Soccer UFC / MMA Esports Leaderboard About FAQ Betting Calculators My Account
← All calculators

Kelly Criterion Calculator

Size a bet from your edge and bankroll with the Kelly formula.

How it works

The Kelly criterion sizes a bet in proportion to your edge: fraction = (b x p - q) / b, where b is the decimal odds minus 1, p is your win probability, and q is 1 - p. No edge means no bet.

Full Kelly assumes your probability estimate is exactly right, which it rarely is. Many bettors use half or quarter Kelly to cut the swings that come from overestimating an edge.

Calculators show the math. The CappingAlpha rankings do the rest: every game, every day, run through our proprietary scoring engine.

More free calculators