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Free tool · Risk & sizing

Position Size Calculator

Turn account balance, risk % and stop-loss into an exact lot size. Everything runs in your browser — nothing is sent anywhere.

100% PRIVATERuns locally on your device
1Account details
%
You risk per trade
2Trade details
pips
USD
Auto-calculated
Advanced options
1 :
These values don't affect the position size calculation.
Result
Recommended position size
0.50 lots
Risk per pip
Units
Est. margin
Notional exposure
Risk level
012345%
Money at risk
Margin / balance
Indicative — pip value in account currency; notional & margin use the price and leverage above.
Pro tip Keep risk per trade between 0.25% and 1% for sustainable long-term risk management.
The math

How it works

Your risk budget is balance × risk%. Divide it by what one pip of stop-loss costs (stop pips × pip value per lot) and you get the lot size that keeps the loss at exactly that budget if the stop is hit.

lots = (balance × risk%) ÷ (stop pips × pip value/lot)
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