Position Size Calculator
Risk %, stop-loss → exact lot size. No login, nothing about you is collected.
1 pip on EUR/USD = 0.0001 in price.
Uses standard contract sizes (100,000 units for forex, 100 oz for gold). Spread, commission and slippage can make the real loss larger. Check your broker's contract specification.
Illustrative calculation only. Uses standard contract sizes and the exchange rates you enter. Excludes spreads, commissions, swaps and slippage, and your broker may use different contract sizes or lot steps. Not investment advice and not a guarantee of any outcome.
How the position size calculator works
Decide how much you can lose if the trade goes wrong, then decide where the trade is proven wrong (your stop-loss). The calculator joins the two: it finds the lot size where hitting the stop costs exactly your chosen risk.
Lots = risk amount ÷ (stop-loss pips × pip value per lot)
Stop first, size second
Place the stop where the market structure says your idea is wrong, not where the loss feels comfortable. If the right stop is wide, the answer is a smaller position, not a tighter stop. Check the value of each pip with the Pip Value Calculator.
Leverage does not change the risk
Leverage only decides how much margin the position locks up. The loss at your stop depends on the size and the distance. See how margin and stop-out interact in the Leverage & Margin Simulator, and compare costs per lot with Compare Brokers.