How this calculation works
Measure population or sample variance from a numerical data set. The result is calculated locally in your browser from the visible inputs, and the method below remains available for checking.
Worked example
The population variance of 2,4,4,4,5,5,7,9 is 4.
Assumptions and limits
- Inputs use the units shown beside each field.
- Intermediate values retain precision; displayed values are rounded for readability.
Questions people ask
How does the Variance Calculator work?
It applies this displayed method: Variance averages squared deviations from the mean, using n or n−1 according to the selected data type. Values stay in your browser and are not submitted to a server.
What should I check before using the Variance result?
Inputs use the units shown beside each field. Intermediate values retain precision; displayed values are rounded for readability. The result follows the displayed mathematical definition and the precision of the values entered.
Does this Variance calculator save my information?
No. Calculation inputs are processed on this device. Sharing creates a URL only when you choose the share action.