Position size calculator
Find how much to buy so a stop-loss only costs the risk you choose.
Amount at risk—
Units bought—
Position value—
Required margin—
Stop distance—
How to size a position
Professional traders size positions so that hitting the stop-loss costs only a fixed share of the account — typically 0.5–2%. Position size = (account balance × risk %) ÷ |entry − stop|. Leverage only changes the margin required, not the risk.
Frequently asked questions
What is a good risk per trade?
Many traders risk 1% or less of their account per trade so a losing streak cannot wipe them out.
Does leverage increase my risk?
If the position size stays the same, leverage only reduces the margin you post. Risk increases only when leverage is used to open larger positions.
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