Variance Calculator
Last updated: July 2026
Calculate population variance, sample variance, mean and standard deviation from a list of numbers.
Population variance
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- Sample variance: —
- Mean: —
- Population standard deviation: —
- Count: —
On this page
Quick summary: Calculate population variance, sample variance, mean and standard deviation from a list of numbers. Enter the values, calculate, review the result, and compare another realistic scenario when useful.
Read the complete guide
What this calculator estimates
Calculate population variance, sample variance, mean and standard deviation from a list of numbers. The calculation runs locally in your browser and is intended for quick reference and comparison.
How to use it
Enter the requested values, select Calculate, review the headline result and supporting figures, then change one input at a time to compare another scenario.
How the calculation works
Variance is the average squared distance from the mean. Sample variance divides by n − 1 instead of n.
Important limitations
A sample with one value has no sample variance. Outliers can strongly affect variance.
Frequently asked questions
Is the result exact?
The calculator follows the stated formula and rounds only for display. Results can still depend on the quality and meaning of the values you enter.
Can I compare different scenarios?
Yes. Change one input at a time to see how it affects the result.
Does the calculator store my inputs?
The calculation runs in your browser and does not require an account. Avoid entering unnecessary confidential information.