Kelly calculator
Size a stake from the odds, your win probability and your bankroll.
2.50 decimal · 40.00% implied
%
$
Kelly fraction
Suggested stake
$41.67
% of bankroll4.17%
Full Kelly8.33%
Break-even probability40.00%
Kelly calculator FAQ
What is the Kelly criterion?
A formula that sizes a stake as a share of your bankroll, from the odds and your estimated win probability.
Why use half or quarter Kelly?
Full Kelly assumes your probability is exact. Estimates rarely are, and a fraction of Kelly reduces the swings in your bankroll.
Why is the suggested stake $0?
When your probability is at or below the break-even probability for the odds, the formula gives zero or less.
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Every bet, already researched
EdgHouse is the research app for bettors who want to think for themselves.
Start 7-Day Free TrialNo charge until day 8. Cancel anytime.
Every bet, already researched
EdgHouse is the research app for bettors who want to think for themselves.
No charge until day 8. Cancel anytime.