Position Size Calculator โ Risk-Based Forex & Crypto Sizing
Determine the ideal position size for any trade based on account balance, risk percentage, and stop loss in pips. Supports 76+ instruments across forex, crypto, metals, indices and commodities.
๐ Live Price: EUR/USD
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How to Calculate Position Size
Position sizing is the process of determining how many units to trade so your maximum loss on a trade never exceeds a set percentage of your account balance. It is one of the most important skills in trading โ even a profitable strategy can fail with poor position sizing.
The formula for position size is:
Example: $10,000 account ร 1% risk = $100 at risk. With a 20-pip stop loss and $10 pip value (EUR/USD standard lot) โ 0.50 lots (50,000 units).
Position Size vs Lot Size โ What's the Difference?
Position Size
The monetary value of your trade exposure โ how many dollars worth of an asset you are controlling. Calculated from your account balance and risk %. Changes with every trade depending on your stop loss distance.
Lot Size
The standardized unit size of a trade: standard (100,000), mini (10,000), or micro (1,000) lots. Your position size determines how many lots you should trade for a given risk amount and stop loss.
Position Size Examples by Account Size & Risk
| Account Balance | Risk % | Risk Amount | Stop Loss (pips) | Position Size (EUR/USD) |
|---|---|---|---|---|
| $1,000 | 1% | $10 | 20 | 0.05 lots |
| $5,000 | 1% | $50 | 20 | 0.25 lots |
| $10,000 | 1% | $100 | 20 | 0.50 lots |
| $10,000 | 2% | $200 | 20 | 1.00 lots |
| $50,000 | 1% | $500 | 20 | 2.50 lots |
Frequently Asked Questions
What is position sizing in forex trading?
Position sizing is determining how many lots or units to buy or sell so that the worst-case loss on a trade (at the stop loss) equals your predefined risk amount. It keeps your losses consistent regardless of how far your stop loss is from the entry price.
How much should I risk per trade?
Most professional traders risk between 0.5% and 2% of their account per trade. Beginners and prop firm challengers typically use 0.5%โ1% to maximise longevity. Risking more than 2โ3% per trade significantly increases the probability of account ruin over a long series of trades.
Does position size change when I switch currency pairs?
Yes. Pip value differs between currency pairs. EUR/USD has a fixed $10 pip value per standard lot in a USD account, but JPY pairs and cross pairs have different pip values. Always recalculate position size when switching instruments โ this calculator handles that automatically.
What is the difference between position size and leverage?
Position size is how many units you trade based on your risk. Leverage is the multiplier your broker provides to control a larger position with less capital. High leverage does not increase your risk if you size positions correctly โ risk is determined by your stop loss distance and position size, not by leverage alone.