Kelly Criterion Bet Sizing Calculator

Optimal % of bankroll
Bet size ($)
Edge

f* = (bp − q) / b where b = odds − 1, q = 1 − p. Negative f* means don't bet.

About this tool

Kelly Criterion Bet Sizing Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.

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