Position Size Calculator
Determine the optimal lot size for any trade based on your account balance, risk tolerance, and stop loss distance. The #1 risk management tool for traders.
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Position Size Calculator Formula
Lots = Risk Amount ÷ (SL Pips × Pip Value per Lot)
Example: $10,000 acct · 1% risk · 20-pip SL on EUR/USD: $100 ÷ (20 × $10) = 0.50 lots
Position Size Calculator FAQ
1How do you calculate position size in forex?
Position size = (Account balance × Risk %) / (Stop loss in pips × Pip value per lot). For example, with $10,000 balance, 1% risk, and 20-pip stop loss on EUR/USD: (10,000 × 0.01) / (20 × $10) = 0.50 lots.
2What percentage should I risk per trade?
Most professional traders risk 1-2% of their account per trade. Beginners should start with 0.5-1%. Never risk more than 5% on a single trade.
3Why is position sizing important?
Position sizing prevents catastrophic losses. Even with a 50% win rate, proper position sizing ensures you survive losing streaks and grow your account over time.
4How does leverage affect position size?
Leverage doesn't change your position size calculation — it only determines how much margin you need. Your risk per trade should always be based on account balance, not available leverage.
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Calculator results are estimates only — not financial advice. Trading involves significant risk of loss. Full risk disclosure.