Position Size Calculator
Decide how much you are willing to lose first, then let the maths pick the lot size. Position sizing is the single most important habit in risk management.
Rounded down to the nearest 0.01 lot so you never risk more than the amount you chose.
How it works
The calculator uses the standard fixed-risk formula:
Lots = (Balance × Risk %) ÷ (Stop-loss in pips × Pip value per lot)
Example: a $5,000 account risking 1% ($50) with a 25-pip stop on EUR/USD (pip value $10 per lot) gives 50 ÷ (25 × 10) = 0.20 lots. If the trade hits the stop, you lose about $50 — no more.
The result is rounded down to the nearest 0.01 lot so the real risk is never above your chosen percentage. A wider stop-loss means a smaller position; a tighter stop allows a larger one — the dollar risk stays the same.
Frequently asked questions
What percentage should I risk per trade?
Does this work for gold?
Why is my lot size “below 0.01”?
Does it include spread and commission?
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Disclaimer: these calculators are for education and planning only and are not financial advice. Results are estimates — real pip values, spreads, commissions and swaps differ by broker. Trading leveraged products involves a high risk of loss. Read the full risk disclosure.