Find the exact forex lot size to risk the amount you want, no more, no less. Enter your capital, your percentage risk and your stop loss distance: this fx position size calculator gives you the answer instantly, free and with no sign-up. The same tool doubles as a lot size calculator futures traders can use on contract-based instruments, and as an fx lot size calculator on gold and indices.
Amounts are in your account currency. The pip value per lot is preset by instrument (editable via "Custom").
Choose the percentage of your capital you accept to lose on this trade (often 1%). Risk in money = capital × percentage. It's the maximum you lose if your stop is hit.
Count the number of pips (or points) between your entry and your stop loss. The wider the stop, the smaller the position must be to keep the same risk.
Size = risk in money ÷ (stop distance × pip value per lot). The calculator rounds down so you never exceed your chosen risk.
The full formula: position size = (capital × risk %) ÷ (stop loss in pips × pip value per lot). This calculation is what makes "I risk 1% per trade" concrete.
Want to understand the calculation in depth, with the common mistakes to avoid and a worked example?
Read the full guide →Size = (capital × risk in %) ÷ (stop distance in pips × pip value per lot). You set your risk in money first, then divide it by the trade's "unit" risk. That way you always lose the same amount if stopped out, whatever the stop distance.
The most common rule is 1% of capital per trade. Below that, your curve is smoother but progress slower; above 2%, a losing streak can hurt badly. 1% is a good starting point for most traders.
Yes. The pip value per lot is preset for XAUUSD (gold), major forex and US30/NAS100 indices, so it works as an xauusd lot size calculator with nothing to change. For contracts, it serves as a lot size calculator futures traders can use too: choose "Custom" and enter the tick value your broker gives you. Same method for any exotic instrument.
Yes, whenever your stop distance changes. That's what keeps your risk constant: a wider stop requires a smaller position, and vice versa. Keeping the same size while changing your stop lets your risk drift without you knowing.
Yes, fully free and no sign-up. Tradoshi offers it as an open tool. The app goes further by computing your size automatically from your account and adjusting your risk after a loss or a win.