Free calculator
Kelly Criterion Stake Calculator
Calculate the mathematically optimal stake size to maximize bankroll growth long-term. Most professionals use 25% (quarter) Kelly to reduce variance.
25% recommended
Recommended stake
$25.00
% of bankroll
2.50%
Edge per $1
10.00%
What this means
The Kelly formula sizes your stake based on your edge and bankroll. Full Kelly maximizes long-term growth but has high variance — a losing streak can drop your bankroll by 50%+ even with a positive edge. Quarter Kelly (0.25) is the typical safer choice.
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