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Free Lot Size Calculator for Forex, Gold, Indices & Crypto
PositionSize Forex is a free online position size calculator and lot size calculator designed for forex traders, gold (XAUUSD) traders, index traders, and crypto traders. Instantly calculate the perfect lot size based on your account balance, risk percentage, and stop loss — no signup, no downloads, 100% free.
How to Calculate Lot Size
Calculating the right lot size is the foundation of proper risk management in trading. The formula is simple: Lot Size = Risk Amount ÷ (Stop Loss in Pips × Pip Value). Enter your account balance, choose how much you want to risk per trade (e.g., 1% or 2%), set your stop loss in pips or as a price level, and the calculator does the rest. It works for all instruments — forex pairs, XAUUSD gold, silver (XAGUSD), US30, NAS100, crude oil, Bitcoin, and more.
Lot Sizes Explained: Standard, Mini, Micro & Nano
In forex trading, lot sizes determine your position size. A standard lot (1.00) equals 100,000 units with a pip value of $10 on USD pairs. A mini lot (0.10) equals 10,000 units at $1/pip. A micro lot (0.01) equals 1,000 units at $0.10/pip. A nano lot (0.001) equals 100 units at $0.01/pip. Our calculator shows you the risk breakdown for every lot type so you can choose the one that fits your trading plan.
Gold (XAUUSD) Lot Size Calculator
For gold trading, 1 standard lot equals 100 troy ounces. With XAUUSD, 1 pip = $0.01 movement, so 1 lot has a pip value of $1. If gold moves from 5278.00 to 5288.00 (1000 pips/points), that's $1,000 profit on 1 standard lot. Use our calculator to find the exact lot size for your gold trades based on your risk tolerance.
Profit Calculator
Use the Profit Calculator tab to quickly estimate how much you'll make or lose on a trade. Just enter your lot size and the number of pips gained or lost. It shows profit for your custom lot size plus a full breakdown for nano, micro, mini, and standard lots — perfect for comparing potential returns before entering a trade.
Supported Instruments
PositionSize Forex supports 70+ trading instruments across all major asset classes:
Forex Pairs
All major pairs (EURUSD, GBPUSD, USDJPY, AUDUSD, USDCAD, NZDUSD, USDCHF), minor/cross pairs (EURJPY, GBPJPY, EURGBP, AUDNZD, CADJPY, and many more), plus exotic pairs (USDTRY, USDMXN, USDZAR, EURNOK, and others).
Metals
Gold (XAUUSD, XAUEUR, XAUGBP, XAUAUD, XAUJPY), Silver (XAGUSD), Platinum (XPTUSD), Palladium (XPDUSD).
Indices
US30 (Dow Jones), US500 (S&P 500), NAS100 (Nasdaq), UK100 (FTSE), GER40 (DAX), JP225 (Nikkei), AUS200, HK50, INDIA50 (Nifty 50), and more.
Energy
WTI Crude Oil (USOIL), Brent Crude Oil (UKOIL), Natural Gas (NGAS).
Crypto
Bitcoin (BTCUSD), Ethereum (ETHUSD), Solana (SOLUSD), Ripple (XRPUSD), Cardano (ADAUSD), Dogecoin, Litecoin, Polkadot, Avalanche, Chainlink, Polygon.
Stock CFDs
Apple (AAPL), Tesla (TSLA), NVIDIA (NVDA), Microsoft (MSFT), Amazon (AMZN), Meta, Google, Netflix, JPMorgan, AMD, Boeing, Disney, Nike, Coinbase, Visa.
Why Use a Position Size Calculator?
Professional traders never enter a trade without calculating their position size first. A lot size calculator ensures you never risk more than you planned, protects your account from a single bad trade, and helps maintain consistency across all your trades. Whether you're trading forex, gold, or crypto, proper risk management is what separates profitable traders from the rest.