Lot Size Calculator
Calculate forex lot size from account balance, risk percentage, stop loss, and pip value. Includes standard, mini, and micro lot equivalents.
$
%
pips
$
Recommended Lot Size 0.40 standard lots
Risk Amount $100.00 maximum planned loss
Position Units 40,000 base currency units
Mini Lots 4.00
Micro Lots 40.00
Risk Per Pip $4.00
Lot Size Formula
Risk amount = Account balance x Risk %
Lot size = Risk amount / (Stop loss x Pip value per standard lot)
This is the same core logic used in many forex lot size calculator and position size calculator workflows.
Frequently Asked Questions
- A common formula is Lot size = Risk amount / (Stop loss in pips x Pip value per standard lot). This helps align trade size with your risk plan instead of guessing.
- A standard lot is typically 100,000 units of the base currency. A mini lot is 10,000 units, and a micro lot is 1,000 units.
- Many traders use 1% or less of account balance per trade, though the right level depends on strategy and risk tolerance. Smaller risk percentages reduce the chance of large drawdowns.
- A wider stop loss means more risk per lot, so your position size must be smaller to keep total risk the same. A tighter stop allows a larger lot size at the same risk percentage.
- Pip value is the money gained or lost for a one-pip move. For many USD-quoted pairs, a standard lot is often about $10 per pip, but the exact value can vary by pair and account currency.
- Yes. This page is designed for forex-style risk sizing. Enter your account balance, risk percentage, stop loss, and pip value to estimate standard, mini, and micro lot sizes.
- Lot size is the size of the position you open. Leverage is the borrowed exposure your broker allows. They are related, but lot size should still be based on risk first.
- You can if you know the correct value per point, pip, or tick for one standard contract or lot. Replace the default pip value with the instrument-specific value from your broker.