Forex Lot Size Calculator
Calculate the exact lot size for forex trades based on your account balance, risk percentage, stop loss pips, and pip value.
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Forex Lot Size
Forex lot size calculation combines your risk management rules with pip value to determine exact position size.
Risk Amount = Account Balance × Risk %
Lot Size = Risk Amount / (Stop Loss Pips × Pip Value per Lot)
Standard pip values per standard lot (100,000 units) for USD account:
- EUR/USD, GBP/USD, AUD/USD, NZD/USD: $10 per pip
- USD/JPY: ~$6.50–$7.50 per pip (varies with rate)
- USD/CHF: ~$10.50–$11.50 per pip (varies with rate)
Lot sizes:
- 1.00 lot = 100,000 units (standard)
- 0.10 lot = 10,000 units (mini)
- 0.01 lot = 1,000 units (micro)
Example: $10,000 account, 1% risk, 25 pip stop loss, $10/pip: Risk = $100. Lot size = $100 / (25 × $10) = 0.40 lots
Best practice: Always round DOWN to the nearest allowed lot increment to avoid exceeding your risk limit.