Position Size Calculator

Risk-based sizing with entry, stop loss and leverage up to 50×. Get units, notional, required margin, risk $ and estimated fees. Export CSV or share.

Account Balance (USD) Risk per Trade (%)

Side Leverage (1–50×)

Entry Price (USD) Stop Price (USD) Fees (% per side, optional)

Formula: Units = Risk$ / |Entry − Stop|. Notional = Units × Entry. Margin = Notional / Leverage. Fees ≈ Notional × Fee% × 2 (round trip).

Frequently Asked Questions

How do I calculate position size?

Set account balance and risk %, provide entry and stop loss. The tool divides your risk dollars by the distance between entry and stop to get units, then derives notional, margin and fees.

Does leverage change my risk?

Leverage affects required margin, not your dollar risk from the stop distance. Risk is controlled by position size and stop placement.

Are trading fees included?

Yes. Add a per-side fee % to estimate round-trip fees alongside your other outputs.