How to use this calculator
- Enter your account balance.
- Choose how much of it you are willing to lose on this trade (risk %).
- Enter the distance to your stop loss in pips.
- Choose the currency pair and your account currency. If your account currency differs from the pair's quote currency, enter the exchange rate shown.
The calculator shows the position size in lots and units, the amount at risk, and the value of one pip per standard lot.
The formula
Lots = (balance × risk %) ÷ (stop loss in pips × pip value per lot)
Worked example
A $1,000 account risking 1% ($10) with a 25-pip stop on EUR/USD: $10 ÷ (25 × $10) = 0.04 lots.
Why position sizing matters
Choosing your position size from your risk keeps every loss small and predictable. It is the single most effective habit for protecting a trading account. Read how to calculate position size for more examples.