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Forex tool · Position sizing

Forex position size calculator

Set the maximum account risk first. The calculator then converts that limit and the stop distance into a position size; it does not choose the trade for you.

Calculation updated October 1, 2026
01

What this calculator answers

Use it when the entry and stop-loss prices are already known. It estimates a position size whose planned loss at the stop matches your chosen risk limit.

Risk amount100.00 USDPosition size (lots)0.20Base-currency units20,000

FormulaLots = risk amount ÷ (stop in pips × pip value per lot).

This is a theoretical size. Fees, slippage and the broker’s minimum size or lot step can change actual risk; check the order rules before using it.

02

How to use it

  1. 01

    Enter the current account balance.

  2. 02

    Set the maximum percentage you are prepared to lose on this one trade.

  3. 03

    Measure the distance from entry to stop-loss in pips.

  4. 04

    Enter the value of one pip for one standard lot. If it is unknown, calculate it with the pip-value tool first.

Worked example

With a $10,000 balance, 1% risk, a 50-pip stop and $10 per pip for one lot, the planned loss is $100 and the position size is 0.20 lots, or 20,000 base-currency units.

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Risk note

Trading involves substantial risk. Educational content is not financial advice.

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