Position size calculator
How much to trade for a given risk, stop and entry. Forex, crypto, stocks.
Assumes a USD account and USD-quoted instruments. Account-currency conversion is coming later.
How it works
This calculator answers the core risk-management question: how many lots to open so that if your stop-loss is hit you lose exactly the chosen percent of your account. Each instrument has its own spec — contract size and pip step — which is why one lot of euro and one lot of gold are worth different amounts. We account for that.
Risk in money: balance × risk% ÷ 100. Loss per lot at your stop: distance to stop × contract size. Hence lots = risk in money ÷ loss per lot. For forex the contract is 100,000 units of the base currency, for gold 100 ounces, for crypto 1 coin (a lot equals a coin).
Forex example: 10,000 account, 1% risk (100), EUR/USD, entry 1.0850, stop 1.0800. Distance 0.0050 (50 pips), loss per lot 0.0050 × 100,000 = 500, size 100 ÷ 500 = 0.2 lots. Gold example: same 100 risk, entry 2400, stop 2390, distance 10 × 100 oz = 1000 per lot, size 0.1 lots. Everything is computed in your browser; nothing is sent anywhere.
This material is for informational purposes only and does not constitute individual investment advice.