Position Size Risk Calculator
Size a trade from fixed account risk.
Calculate position size risk calculator from clear inputs
Position Size Risk Calculator gives a focused worksheet for finance & money questions where a quick deterministic estimate is more useful than a spreadsheet. The position size risk calculator fields mirror the variables in its formula, and the output separates the main result from supporting values so you can sanity-check this calculation before reusing it.
A 25000 account risking 1 percent with 2.5 per-share risk allows 100 units.
Keep the estimate private in your browser
For Position Size Risk Calculator, every calculation runs in your browser with no upload, account, cookie, live lookup, or server-side storage. The position size risk calculator result is best treated as a planning number because the real-world constraints behind this estimate can change the answer. Adjust the position size risk calculator assumptions and confirm important decisions against the relevant source of truth for that exact situation.
Frequently Asked Questions
How is the position size calculated?
Dollars at risk (account × risk percent) ÷ risk per unit (entry − stop). A $25,000 account risking 1% with a $2.50 stop distance allows 100 units, a $5,000 position.
Why size positions by risk?
It keeps each loss to a fixed share of the account whatever the stock price or stop distance, so a string of losing trades cannot wipe out the account.
Does it account for slippage or gaps?
No. Prices can gap past a stop order, so real losses can exceed the planned amount. Some traders size slightly smaller to allow for this.
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