Position size calculator
Size a trade from entry, stop, risk budget and costs.
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Understanding your calculation
For instruments priced per unit in the same currency as your account. Lot step rounds quantity down; capital limit is a notional cap, not a margin model. Slippage and gaps can cause losses above the estimate. No live prices or trade recommendations.
- Enter your own values and choose the applicable calculation options.
- Review the breakdown and assumptions; change one input to compare a scenario.
- Download the calculation CSV to retain your inputs and result for independent checking.
Limits and checks
Inputs are validated locally. Results are estimates using the stated model, without live market data, automatic tax classification or personalized financial advice.
Frequently asked questions
What assumptions does the position size calculator use?
For instruments priced per unit in the same currency as your account. Lot step rounds quantity down; capital limit is a notional cap, not a margin model. Slippage and gaps can cause losses above the estimate. No live prices or trade recommendations.
Is my content sent to a server?
No. Processing runs inside your browser. Optional editor recovery saves a draft on this device only. Read the privacy policy.
Can I rely on this as a financial decision?
No. Check the model, inputs and assumptions independently. Real borrowing costs, returns, fees and trading losses can differ. Consult a qualified professional when appropriate.