Kelly Calculator

Use this free kelly calculator to calculate the Kelly criterion stake from win probability and odds.

How the kelly calculator works

f* = (b × p − q) ÷ b, where b is net odds (decimal odds − 1), p the win probability and q = 1 − p.

Frequently asked questions

Should I use full Kelly?

Many people use half or quarter Kelly to reduce volatility. This is a maths tool, not advice.

Results are estimates for general information only. They are not a substitute for professional advice where applicable. Found a mistake? Report an error.