Risk Management
Kelly Criterion Position Size Calculator
Enter your historical win rate and average reward:risk ratio (average win divided by average loss) to get the Kelly Criterion position size. Most traders use half-Kelly or less to reduce variance. Free to use, no signup required.
Full Kelly %···
Half Kelly % (common practical use)···
Quarter Kelly % (conservative)···
Half Kelly $ amount···
Educational tool only, not financial advice. Kelly assumes your win rate and reward:risk stay stable. Markets rarely cooperate. A negative result means the edge doesn't support a position at all.
Built by Jason Parker, founder of Trading Ranges.
Built by Jason Parker, founder of Trading Ranges.