Stocks calculator

Position Size Calculator

Use this free Position Size Calculator to work out risk amount from portfolio value, risk per trade (%), entry price, and stop-loss price, with instant result cards and the exact formula shown below.

Inputs

Calculator inputs

Adjust the values below to calculate the result instantly.

Results

Calculation summary

Risk amount0.00
Risk per share0.00
Position size0.00
Position value0.00
FormulaView calculation method
Risk amountPortfolio value x Risk %
Risk per shareAbsolute difference between entry and stop-loss
Position sizeRisk amount / Risk per share
GuideHow to use this calculator
Step 1Enter the stock market values from your broker, fund statement, exchange, or research source.
Step 2Click Calculate result to update the output cards, then review the formula section for how the result is derived.
TipFor more planning tools, return to the related calculator links or the main calculator category page.

What this calculator helps with

The Position Size Calculator estimates risk amount from portfolio value, risk per trade (%), entry price, and stop-loss price. It is a focused stock calculator you can use free with no signup, repeating the calculation with your own numbers whenever your inputs change.

How to read the results

After you press Calculate result, the summary cards show risk amount, risk per share, position size, and position value. Read risk amount as the headline figure and use the supporting values for context, then change one input at a time to see how sensitive the result is.

Before relying on the numbers

This stock calculator applies the formula Portfolio value x Risk %. Enter portfolio value, risk per trade (%), entry price, and stop-loss price using consistent units and the same currency, include any applicable fees or taxes, and confirm important decisions against your broker, fund statement, exchange data, or a qualified professional.

FAQ

Frequently asked questions

What is the Position Size Calculator used for?

The Position Size Calculator is a free stocks calculator that works out risk amount from portfolio value, risk per trade (%), entry price, and stop-loss price. Enter your own figures to get an instant result with the formula shown on the page.

What formula does the Position Size Calculator use?

It calculates Risk amount = Portfolio value x Risk %, Risk per share = Absolute difference between entry and stop-loss, and Position size = Risk amount / Risk per share. The tool reports risk amount, risk per share, position size, and position value.

Where do I get the numbers for the Position Size Calculator?

Take portfolio value, risk per trade (%), entry price, and stop-loss price from your broker statement or exchange. The Position Size Calculator never fetches live market data, so the output depends only on the values you type in.

Are the Position Size Calculator results financial advice?

No. The Position Size Calculator is an educational tool. Treat risk amount as an estimate, re-check your inputs, and confirm important investment decisions with a qualified professional.

Can I use the Position Size Calculator with any currency or market?

Yes. Keep portfolio value, risk per trade (%), entry price, and stop-loss price in the same currency and consistent units, and the Position Size Calculator applies the same calculation to any market.