Position Size Calculator
Enter your account size, risk per trade and stop distance. Instantly get the position size that keeps risk under control.
Risk amount
100
Stop distance
5
Position size (shares/units)
20
Position value
2,000 · 20% of account
Position size = (Account × Risk%) ÷ |Entry − Stop|
How it works
Risk-based sizing flips the usual question. Instead of "how many shares can I afford?", you ask "how many shares keep my loss within my risk limit if the stop is hit?". Fix the dollars you're willing to lose, and the position size follows from your stop distance.
Formula: Position size = (Account × Risk%) ÷ |Entry − Stop|. Keeping risk per trade small (often 0.5–2%) is what lets you survive losing streaks.