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Position Size Calculator

Calculate shares from account size, risk and stop distance.

No signupInstant calculationEducational use
01

Choose a market reference

Search by company name or ticker, then select the correct security from the suggestions.

AA
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Fetching the latest available price.

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02

Define account risk

Add your account balance, planned risk and stop-loss level.

0%account used
Position value$0.00$25,000.00 remains unallocated
Risk levelModerate
Lower1% of accountHigher
Stop lossNot enteredEntry referenceLoading

$0.00 per share • 0% stop distance

03

Your calculated position

The recommended maximum uses the smaller of the risk-based size and the capital-limited size.

◎Maximum planned risk$250.00Based on the values above
↕Risk per share$0.00Based on the values above
▦Risk-based position size0 sharesShares allowed by planned dollar risk
◫Capital-limited position size0 sharesMaximum whole shares affordable
△Recommended maximum position0 sharesUses the tighter of both limits
✓Position value$0.00Capital allocated at entry
◎Actual dollar risk$0.00Risk after the capital limit
ⓘ The displayed market price is a planning reference, not a guaranteed execution price. Spread, slippage, fees and rapid price movement can change actual risk.

What is a Position Size Calculator?

Use this free position size calculator to estimate how many shares may fit a predefined dollar or percentage risk limit. Position sizing connects account risk, entry price and stop-loss distance so one trade does not unintentionally consume too much capital.

Formula

Position size = Maximum dollar risk ÷ Risk per share

Example calculation

With a $25,000 account, 1% risk, a $100 entry and a $95 stop, maximum risk is $250, risk per share is $5 and estimated size is 50 shares.

How to use this tool responsibly

  • Define the stop before calculating size.
  • Use a consistent risk policy.
  • Leave room for slippage and fees.

Frequently asked questions

Is this tool free?

Yes. This tool is free to use and does not require an account.

Does this tool provide financial advice?

No. Results are educational estimates, not financial, investment, tax, or legal advice.

Are fees and slippage included?

Only when the calculator provides an input for them. Real results may differ because of spread, slippage, commissions, taxes, and execution quality.

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Important disclaimer

This tool is for education and planning only. It does not provide financial advice or guarantee any result. Market orders, stop orders and limit orders may execute differently from estimates because of liquidity, volatility, spread, slippage and platform behavior.