Position Size Calculator
Enter your risk amount and stop-loss distance to get the exact notional position size. Protecting your capital is the #1 job of a trader.
$
Your max loss for this trade.
%
Distance from Entry to SL.
Est. fees in dollars.
Position Size (Notional)
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Why is accurate sizing critical?
Most trading errors—panic selling, FOMO, or holding losers too long—stem from sizing errors. When your position is too large, your emotions take over the wheel.
- Survival first: By fixing your risk (e.g., 1% of equity), you survive a losing streak.
- Emotional stability: Small losses are just "business expenses". Big losses cause trauma.
- Consistency: You cannot measure the performance of a strategy if your risk varies wildly from trade to trade.
Master Risk Management
Understanding position sizing is just step one. Learn about Risk-to-Reward ratios, drawdown recovery math, and how to build a professional risk plan in our Learn section.