Lot Size Calculator

How to Calculate Lot Size

Lot size is the most critical risk management decision in forex trading. The formula is simple: Lot Size = Risk Amount / (Stop Loss Pips × Pip Value).

Lot Size Types

• Standard Lot — 100,000 units. $10 per pip on EUR/USD
• Mini Lot — 10,000 units. $1 per pip on EUR/USD
• Micro Lot — 1,000 units. $0.10 per pip on EUR/USD

The 1% Rule

Most professional traders risk no more than 1-2% of their account balance per trade. On a $10,000 account with 1% risk, your maximum loss per trade is $100. With a 50-pip stop loss, that means 0.20 standard lots.