# Position Size Calculator

> Free forex position size calculator: turn balance, risk % and stop-loss pips into exact lot size — standard, mini, micro and units. Formula shown in full.

**Source:** https://propfirmito.com/tools/position-size-calculator/  
**Last modified:** 2026-07-07

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# Position Size Calculator (Forex)

Work out exactly how many lots to trade from your account balance, the percentage you risk per trade and your stop-loss distance in pips. Defaults use $10 per pip per standard lot, which is correct for USD-quoted pairs like EUR/USD.

Account balance ($) Risk per trade (%) Stop-loss (pips) Pip value per standard lot ($) Calculate

## Results

Risk in dollars $100.00

Standard lots 0.50

Mini lots 5.0

Micro lots 50

Units (base currency) 50,000

Pip value of the position $5.00

The results below use the form’s default values. Enable JavaScript to recalculate live with your own numbers.

## How it works

**Formula:** Risk in dollars = balance × risk %. Position size in standard lots = risk $ ÷ (stop-loss pips × pip value per lot). Example: $10,000 × 1% = $100 risk; $100 ÷ (20 pips × $10) = 0.50 lots.

## Frequently asked questions

### How do I calculate my forex position size?

Multiply your account balance by the percentage you risk per trade to get your risk in dollars, then divide that by your stop-loss distance in pips multiplied by the pip value per lot. On a $10,000 account risking 1% with a 20-pip stop on EUR/USD, that is $100 ÷ (20 × $10) = 0.50 standard lots.

### What pip value should I use?

For pairs quoted in USD (EUR/USD, GBP/USD, AUD/USD) one standard lot is $10 per pip. For USD-base pairs like USD/JPY the value changes with the exchange rate — use the Pip Value Calculator to get the exact figure, then enter it here.

### Does this work for prop firm challenge accounts?

Yes. Use the challenge account size as the balance and keep your risk per trade well below the daily drawdown limit — most traders risk 0.5–1% per trade so that several consecutive losses never breach the daily limit.

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Free educational calculator. Not financial advice. Rules differ by firm — always verify exact values on your firm’s official site.