Free tool — no sign-in needed
Position Size Calculator
Risk a fixed % of your account on every trade — enter your account size, entry, and stop loss to get the exact lot/share size. Pure math, no live data needed.
Most brokers: 1 lot = 100 oz. Check your broker's contract spec if unsure.
Result
Enter account balance, risk %, entry, and a stop loss (different from entry) to see your position size.
This is a plain arithmetic tool — position size = (account balance × risk %) ÷ price distance to stop loss, converted to lots via your contract size. It doesn't know your broker's specific margin/leverage rules or account currency conversions — always confirm the final lot size in your platform before placing a trade.