Position Size Calculator
Position Size Calculator
Size a long share position within both a risk budget and available cash.
Your inputs
Change an input to explore the result. Calculations stay in your browser.
Loading calculator…
YOUR RESULT
Enter your assumptions to calculate.
THE CALCULATION
How it works
Risk budget = account × risk %. Shares = floor(min((risk budget − fees) ÷ (entry − stop), (account − fees) ÷ entry)).
- Choose the product, units or currency direction where applicable.
- Enter your amounts and assumptions. A reference price is dated; a manual value is your own input.
- Review the result and breakdown together with the limitations.
READ THE RESULT
Assumptions & limits
Long positions only, with the stop below entry. Stops do not guarantee execution prices; gaps, slippage and taxes can increase losses. No leverage is assumed.
For education and research. No transaction is placed and no outcome is guaranteed.