Position sizing is the single most important skill in trading risk management. This calculator tells you exactly how many units, lots, or shares to buy based on the percentage of your account you are willing to risk on a single trade. It works for forex pairs, US stocks, and crypto assets. Proper position sizing ensures that even a long losing streak cannot destroy your trading account — it is the difference between traders who survive the markets long-term and those who blow up their accounts within months.
This free position size calculator works directly in your browser — no download, no registration, and no delay. All calculations are performed client-side, so your trading data is never transmitted to a server.
The formula used is: Position Size = (Account Balance × Risk %) ÷ (Stop Loss in pips × Pip Value). This is the same formula used by professional traders and institutional risk managers worldwide.
Supported asset classes include: Forex, Stocks, Crypto. Each asset class applies the correct unit conventions so results are always accurate regardless of the market you are trading.