Lot size calculator
Choose how much of the account you are willing to lose if the stop-loss is hit. The calculator returns the lot size, using the pip value of the pair in your account currency.
How it's calculated
- Amount at risk = balance × risk %. 10,000 × 1% = $100.
- Risk per lot = stop distance in pips × pip value of 1 lot. EUR/USD, 20 pips × $10 = $200.
- Lots = amount at risk ÷ risk per lot, rounded down to the lot step: 100 ÷ 200 = 0.50. With a 50-pip stop: 100 ÷ 500 = 0.20.
- USD/JPY at 150, 37-pip stop: pip value $6.67, so 100 ÷ (37 × 6.67) = 0.4054 → 0.40 lots.
Questions
Why round down?
Rounding up would make the loss at the stop larger than the risk you chose. Rounding down keeps it at or just below that amount.
Should I enter the stop in pips or points?
Either. Most platforms show distances in points; 10 points equal 1 pip on currency pairs. On gold and silver a point and a pip are the same here.
Do I need the pair's price?
Only when the pip value depends on it — when the quote currency is not your account currency (for example USD/JPY on a USD account). The price is prefilled and can be edited.
Are spread and commission included?
No. They add to the loss if the stop is hit. To stay within your risk, widen the stop by the spread or lower the risk slightly.
What if the result is 0 lots?
The risk amount is smaller than the loss of one lot step at that stop distance. Use a closer stop, a larger risk %, or a platform with smaller lot steps.