Position size calculator

How much to buy, based on how much you're willing to risk.

Position sizing answers one question: given how much of your account you're willing to risk on this trade, and how far away your stop-loss is, how large should the position actually be? Enter your numbers below — everything runs locally in your browser, nothing is sent anywhere.

Account size ($)

Risk per trade (%)

Entry price ($)

Stop-loss price ($)

Dollar risk—

Risk per unit—

Position size (units)—

Position value—

% of account—

How this is calculated

Dollar risk = account size × risk %. Risk per unit = entry price − stop-loss price. Position size = dollar risk ÷ risk per unit. This tells you how many units to buy so that if price hits your stop, you lose exactly your intended risk percentage — not more, not by accident.

This is a sizing tool, not a signal — pair it with real levels from SignalTrade's support/resistance calculator or the live app to find your entry and stop in the first place.