Lot Size Calculator โ Forex & Crypto Position Sizing
Calculate the correct lot size for any trade based on account balance, risk percentage, and stop loss in pips. Supports 76+ instruments across forex, crypto, metals, indices and commodities.
๐ Live Price: EUR/USD
โ๏ธ Calculator
Auto-filled from live price, can be manually adjusted
How to Calculate Lot Size
Lot size determines how many units of a currency pair or asset you are buying or selling. Correct position sizing ensures that a single losing trade never risks more than a predefined percentage of your account โ the foundation of professional risk management.
The formula for lot size is:
For example: $100 risk, 20 pip stop loss, $10 pip value per standard lot = 0.50 lots (50,000 units).
Lot Size Types โ Units & Risk Reference
| Lot Type | Units | Pip Value (EUR/USD) | Typical Use |
|---|---|---|---|
| Standard Lot | 100,000 | $10.00 | Professional / large accounts |
| Mini Lot | 10,000 | $1.00 | Intermediate traders |
| Micro Lot | 1,000 | $0.10 | Beginners / small accounts |
| Nano Lot | 100 | $0.01 | Practice / cent accounts |
How Much Should You Risk Per Trade?
Recommended for beginners and prop firm challenges. Maximises longevity.
Standard for experienced retail traders with a tested strategy.
High risk. Increases returns but significantly raises ruin probability.
Frequently Asked Questions
What is a lot in forex trading?
A lot is the standard unit of measurement for trade size in forex. A standard lot equals 100,000 units of the base currency. Most retail brokers also offer mini lots (10,000 units) and micro lots (1,000 units) to allow smaller position sizes.
How do I calculate lot size from a percentage risk?
Use the formula: Lot Size = (Account Balance ร Risk %) รท (Stop Loss in Pips ร Pip Value). For a $10,000 account risking 1% with a 20-pip stop on EUR/USD: ($10,000 ร 0.01) รท (20 ร $10) = 0.50 lots.
Why does lot size change between currency pairs?
Pip value differs between pairs because it depends on the quote currency and current exchange rate. EUR/USD has a fixed $10 pip value per standard lot, but JPY pairs and cross pairs fluctuate. Always recalculate lot size when switching instruments.
What lot size should a beginner use?
Beginners should start with micro lots (0.01) while learning. This keeps dollar risk very low per trade (around $0.10 per pip) and allows you to practice position sizing without large losses during the learning phase.