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Tools/Position size

Position size calculator.

Tell it your account, your risk %, and your stop distance. It tells you the exact lot size that fits your rules. No spreadsheet, no guessing.

Position size

Enter your account size, stop-loss, and trade size to see the risk picture.

Suggested size

Enter risk %, stop-loss, and account size to see the suggested size.

How is the position size calculated for the EUR/USD pair on this calculator?

The calculator considers your account balance, risk percentage (e.g. 1%), stop-loss in pips, and, if needed, the current exchange rate to determine the exact position size in lots. For example, when calculating for EUR/USD with a USD account, a 1% risk, and a 50-pip stop-loss, the tool will calculate the precise lot size you should trade.

What is a Position Size Calculator and why should traders use it?

It's a risk-management tool that automatically determines the optimal trade volume (in lots) based on your account size, risk tolerance, and stop-loss level. It helps limit losses and maintain trading discipline, regardless of market conditions.

Does the selected currency pair, such as GBP/JPY, affect the calculation?

Yes. If your account currency differs from the pair's quote currency (e.g. account in USD, pair GBP/JPY), the lot size calculator uses the current market exchange rate to ensure accurate position sizing and risk calculation.

Can I use the calculator for pairs like USD/JPY, XAU/USD, or USD/CAD?

Absolutely. The calculator supports major, minor, and exotic currency pairs, as well as CFDs on commodities like gold (XAU/USD). Simply select the desired pair and input your trading parameters.

Limitations

The conversion rates baked into this tool are approximate. For a broker-accurate lot size always cross-check on the platform you actually trade on. Spread and commission also nudge true risk a little above what the calculator returns. The risk-management module in the curriculum walks through all of this with worked examples.

The rest of the toolbox.

Monte Carlo Simulator

Run your strategy through hundreds of randomized trade sequences. See the worst, best, and most-likely outcomes, not just one optimistic backtest.

Open the simulator→

Stop simulating, start tracking.

The calculator is the floor. The Notion databank Pro members use to journal every real trade is what turns the math into a system you can trust.

See the Pro tier→

Frequently Asked Questions

Position sizing is the math that turns your risk rules into a specific lot size for the next trade. Account balance, risk percentage, and stop distance go in; the lot size that exactly matches that risk drops out. Without it, every trade silently risks a different fraction of your account and the system you think you're trading isn't the system actually playing out.