Variance Calculator
Sample and population variance.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Sample variance
- 4.666667
- Population variance
- 4
- Sample standard deviation
- 2.160247
- Mean
- 6
- Count
- 7
- Coefficient of variation
- 36%
Quick answer
Variance is the average squared deviation from the mean; sample variance divides by n−1 to stay unbiased.
s² = Σ(x − x̄)² / (n − 1)
How to use the Variance Calculator
- 1Paste your values separated by commas.
- 2Use sample variance for a subset, population for the whole group.
- 3Read the standard deviation too.
Frequently asked questions
Why divide by n−1?
It corrects the downward bias when estimating population variance from a sample.
What are the units?
Squared units — take the square root for standard deviation in original units.