Lot Size Calculator
Size every forex and gold trade from your risk, not your margin. Free position size calculator for XAUUSD and the majors.
How it works
Every trade should be sized from risk, not from how much margin is left. The calculator applies the same formula professional traders use:
Lots = (account balance × risk %) ÷ (stop distance × value per pip or per dollar)
- Gold (XAUUSD): 1 lot is 100 ounces, so every $1 move is $100 per lot. Enter your stop in dollars (why gold pips confuse everyone).
- EURUSD, GBPUSD, AUDUSD: 1 pip is $10 per lot.
- USDJPY, USDCHF, USDCAD: pip value depends on the current price, so enter it and the calculator converts to USD.
The result is rounded down to the nearest 0.01 lot, so you never risk more than you set.
What risk per trade should you use?
Most professional scalpers risk between 0.5% and 1% per trade. At 1%, a run of ten straight losses costs about 10% of the account. At 5%, the same run costs 40%. Losing streaks happen to every strategy, and your risk setting decides whether you survive them.
Why leverage doesn’t change this number: Leverage isn’t what blows accounts. Position size is.