Position Size Calculator

The Position Size Calculator helps you quickly estimate a recommended position size based on your account funds, risk percentage, stop loss distance, and current price, helping you control risk more clearly before opening a trade.

Account currency (USD)
USD
Currency pair
EUR/USD
Results
Risk Ratio, % Money, EUR
units
Lots

How is position size calculated?

Position size is usually calculated based on your account funds, risk percentage, stop loss distance, currency pair, and current price. It helps you estimate the maximum suitable trade size before entering a position. The system first calculates the risk amount you can afford for this trade, then converts it into a recommended position size based on the stop loss distance and current price.
Assume your account balance is USD 10,000, the risk percentage is 1%, the stop loss distance is 50 pips, and the trading pair is EUR/USD.

Step 1: Calculate the risk amount
Risk amount = Account balance × Risk percentage; 10,000 × 1% = 100 USD;
If your account balance is USD 10,000 and your risk percentage is 1%, the maximum risk amount you can take on this trade is USD 100.

Step 2: Estimate the recommended position size based on the stop loss distance
The system combines the selected currency pair, current price, and stop loss distance to calculate the maximum position size your risk can support.

Step 3: Output the result
The system will display both the recommended position size in standard lots and trading units, helping you control the risk of each trade more intuitively.

Conclusion: Once your account balance, risk percentage, and stop loss distance are determined, you can use the Position Size Calculator to quickly estimate a suitable position size and avoid increasing single-trade risk with an oversized position.