Position Size Calculator

Professional traders size positions by risk, not by gut feel. Enter your account, risk % and stop to get the exact shares.

No login Educational estimate Shareable URL

The 1% rule

Standard risk-based position sizing used by pros.

Stop-aware

Wider stops mean fewer shares โ€” exactly right.

Account protection

Caps your loss per trade at your chosen risk %.

Example Calculation

Run through a typical scenario with the sample values below โ€” hit See an example to load them instantly.

InputSample value
Account Balance ($)50000
Risk Per Trade (%)1
Entry Price ($)100
Stop-Loss Price ($)95
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How to Use This Tool

Follow the steps below to get accurate results.

  1. Enter account & risk Account balance and the % of the account you risk per trade.
  2. Enter the trade Entry price and stop-loss price.
  3. Size the position Dollar risk, shares to buy, position size and % of account used.

Input Fields

  • Account Balance ($)  ยท  e.g. 50000
  • Risk Per Trade (%)  ยท  e.g. 1
  • Entry Price ($)  ยท  e.g. 100
  • Stop-Loss Price ($)  ยท  e.g. 95

Outputs You Will Get

  • Dollar Risk
  • Shares to Buy
  • Position Size ($)
  • % of Account
Risking 1% per trade means 10 straight losses only cost ~10% of your account.
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How This Calculator Works

Professional traders size positions by risk, not by gut feel. Enter your account, risk % and stop to get the exact shares.

What you will get

Good to know

Position Size Calculator is an interactive estimate built for quick planning. Always double-check the numbers that matter before acting on them, and reach out to a professional for personalized advice.

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Frequently Asked Questions

How does the Position Size Calculator work?

Simply fill in the fields and press Calculate. Professional traders size positions by risk, not by gut feel. Enter your account, risk % and stop to get the exact shares.

What information do I need to provide?

Just the basics โ€” Account Balance ($) and Risk Per Trade (%) and Entry Price ($), plus a few simple inputs. No account or signup is required; everything runs in your browser.

Is Position Size Calculator really free to use?

Yes โ€” completely free, with no login, no watermarks and no limits. Bookmark it and share the URL with anyone who needs it.

How accurate is the estimate?

The calculator uses current, standard formulas to produce an educational estimate. Real-world figures can vary based on your specific situation, so treat it as a planning aid rather than a final answer.

Can I use it on my phone?

Absolutely. The tool is fully responsive and works smoothly on mobile, tablet and desktop browsers.

What should I keep in mind?

The result is an estimate for educational purposes only and is not financial, legal or tax advice. Consult a qualified professional before making important decisions.

Disclaimer: The Position Size Calculator is provided for educational and informational purposes only and does not constitute financial, investment, legal or tax advice. Results are estimates and may not reflect your complete financial situation. Always consult a qualified professional before making financial decisions.