Stocks calculator
Portfolio Risk Calculator
Use this free Portfolio Risk Calculator to work out portfolio volatility from weight A (%), volatility A (%), weight B (%), volatility B (%), and correlation, with instant result cards and the exact formula shown below.
Results
Calculation summary
FormulaView calculation method
Portfolio volatility
Square root of weighted variance and covariance termsGuideHow to use this calculator
Step 1
Enter the stock market values from your broker, fund statement, exchange, or research source.Step 2
Click Calculate result to update the output cards, then review the formula section for how the result is derived.Tip
For more planning tools, return to the related calculator links or the main calculator category page.Continue from here
What this calculator helps with
The Portfolio Risk Calculator estimates portfolio volatility from weight A (%), volatility A (%), weight B (%), volatility B (%), and correlation. 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 portfolio volatility, weight A, weight B, and correlation. Read portfolio volatility 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 Square root of weighted variance and covariance terms. Enter weight A (%), volatility A (%), weight B (%), volatility B (%), and correlation 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 Portfolio Risk Calculator used for?
The Portfolio Risk Calculator is a free stocks calculator that works out portfolio volatility from weight a (%), volatility a (%), weight b (%), volatility b (%), and correlation. Enter your own figures to get an instant result with the formula shown on the page.
What formula does the Portfolio Risk Calculator use?
It calculates Portfolio volatility = Square root of weighted variance and covariance terms. The tool reports portfolio volatility, weight a, weight b, and correlation.
Where do I get the numbers for the Portfolio Risk Calculator?
Take weight a (%), volatility a (%), weight b (%), volatility b (%), and correlation from your broker statement or exchange. The Portfolio Risk Calculator never fetches live market data, so the output depends only on the values you type in.
Are the Portfolio Risk Calculator results financial advice?
No. The Portfolio Risk Calculator is an educational tool. Treat portfolio volatility as an estimate, re-check your inputs, and confirm important investment decisions with a qualified professional.
Can I use the Portfolio Risk Calculator with any currency or market?
Yes. Keep weight a (%), volatility a (%), weight b (%), volatility b (%), and correlation in the same currency and consistent units, and the Portfolio Risk Calculator applies the same calculation to any market.