Lot Size Calculator

Overview

Position sizing is the foundation of proper risk management. The Lot Size Calculator takes the guesswork out of determining how large your position should be. Simply enter your account balance, the percentage you're willing to risk, and your stop loss distance in pips — the calculator does the rest.

Whether you trade standard, mini, or micro lots, the tool provides exact sizes in every format so you can enter your trade with confidence.

Key Features

• Multiple account currencies supported
• Risk % or fixed dollar amount
• Standard, mini, and micro lot output
• 10 major and cross currency pairs
• Real-time calculation as you type
• Total units display for any broker
• Pip value per lot shown
• 100% client-side, no data sent

How It Works

The calculator uses the fundamental position sizing formula:

Lot Size = (Account Balance × Risk%) ÷ (Stop Loss Pips × Pip Value per Lot)

For a $10,000 account risking 1% with a 50 pip stop loss on EUR/USD, the result is 0.20 standard lots (20,000 units). This ensures your maximum loss on the trade is exactly $100 — no matter how volatile the market gets.

Who Is This For?

Every forex trader — from beginners learning the basics of risk management to experienced scalpers and swing traders who need quick, reliable position sizing before each trade. It's especially useful for traders who follow strict risk management rules (1-2% per trade) and need to recalculate their lot size as their account grows or shrinks.