Statistics
Variance Calculator
Focus solely on variance with a clean interface for sample or population datasets.
variancespreadstandard deviation
Variance Focus
Enter values, pick sample or population, and get variance with the matching standard deviation.
Count
4
Variance
20.92
Standard deviation
4.57
Variance definition
Variance = Σ(x − mean)² / (n − δ)
δ equals 1 for sample variance (n − 1 divisor) and 0 for population variance (n divisor).
How to use
- Paste or type values separated by commas or spaces.
- Pick sample or population mode depending on your dataset.
- Review variance and standard deviation results with the same units squared.
Example
Input: Values = 4, 9, 11, 15
Output: Sample variance ≈ 20.92, Sample σ ≈ 4.57
FAQ & notes
Why is variance shown in squared units?
Variance squares the distance from the mean, so the unit is squared. The calculator also shows standard deviation to bring it back to the original scale.
Can I export the results?
Copy the displayed values directly—everything is formatted for quick pasting into reports or spreadsheets.