Variance Calculator
Free online variance calculator that runs entirely in your browser.
How the Variance Calculator works
The Variance Calculator works on Numbers and shows the result as you type. The same input always gives the same answer — refresh the page and you will see exactly the same figure.
Formula used
Variance Calculator is computed by the formula below, using the inputs you provide.
Inputs used: Numbers.
Worked example
Take the default example — numbers of 10, 12, 23, 23, 16, 23, 21, 16:
- standardDeviation: 5.24
- variance: 27.43
- mean: 18
- count: 8
Frequently asked questions
- Is the Variance Calculator free?
- Yes. There is no signup, no usage limit and no watermark — the checker runs entirely in your browser.
- Does the Variance Calculator store or send my data?
- No. Every calculation happens locally in the page, so the numbers you type are never uploaded or logged.
- Does it work on a phone and offline?
- Yes — the page is a single lightweight file that adapts to any screen size. Once it has loaded it keeps working without a network connection.
- What inputs does the Variance Calculator need?
- Numbers. Change any of them and the result updates instantly.