Forex Position Size Calculator: Convert Risk and Pip Distance into Lot Size
Forex position sizing follows the same risk-based logic used in every other market, but the unit of risk is the pip. This page focuses on calculating the correct lot size from account risk and stop-loss distance measured in pips.
Use the free Trading Position Size Calculator to obtain the lot size that keeps your risk within the chosen percentage.
Forex Position Size Formula
Position Size (lots) = Account Risk ($) ÷ (Stop Distance in Pips × Pip Value per Lot)
Pip value depends on the pair and the lot size. For a standard lot of EURUSD the pip value is typically $10. Mini and micro lots scale proportionally.
The general method is identical to the one described on the position size based on risk page; only the definition of “one unit of risk” changes.
Practical Example
$10,000 account, 1 % risk = $100
50-pip stop, $10 pip value (standard lot) → Size = 100 ÷ (50 × 10) = 0.20 lots.
The same $100 risk with a 25-pip stop would allow 0.40 lots. Dollar risk stays constant.
Leverage Note
Leverage changes the margin required to open the position. It does not change the risk-based size. Always size from account risk and stop distance first; then check whether the resulting margin is acceptable. See the position size with leverage page for more detail.
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Frequently Asked Questions
How do you calculate forex position size?
Account Risk ($) ÷ (Stop Distance in Pips × Pip Value per Lot). The result is the number of standard, mini or micro lots that keep risk within the chosen percentage.
What is pip value?
Pip value is the currency amount gained or lost for a one-pip move in a given lot size. For a standard lot of EURUSD it is typically $10 per pip.
Does the same formula work for all pairs?
The logic is identical. Only the pip value changes depending on the pair and the account currency.
How does leverage affect forex position size?
Leverage determines the margin required to hold the position. It does not change the risk-based size. Size is still set by account risk and stop distance.
Can I use the main calculator for forex?
Yes. Enter the account risk, entry, stop and the appropriate pip value (or let the tool handle standard pairs). The result is the correct lot size.
Should I risk the same percentage on every forex trade?
Many systematic traders do. Discretionary traders sometimes reduce size on lower-conviction setups while keeping the maximum percentage as a hard limit.
Final Call to Action
Size every forex trade from the risk you accept and the pip distance to the stop. Let the calculator do the arithmetic.
Calculate your forex position size → Open the free Trading Position Size Calculator
Disclaimer: Trading involves substantial risk of loss. These calculations are educational only and do not guarantee future results. Never risk more than you can afford to lose.