Trading Calculators

Professional tools for position sizing, risk management, and portfolio optimization

Kelly Criterion Calculator

Calculate the optimal fraction of your capital to risk per trade.

Input Mode

Win Rate (%)

Win/Loss Ratio

Capital ($)

Press Enter to calculate

Kelly Fraction

0.50× (Half Kelly (safer))

Half Kelly is generally recommended for real trading — it captures ~75% of the growth rate with significantly less volatility. Full Kelly assumes perfect edge estimation.