Variance Calculator
Enter a list of numbers to calculate variance. Choose sample or population mode and see mean, standard deviation, count, min, and max.
Separate values with commas, spaces, or new lines.
| Metric | Value |
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Privacy: calculations run locally in your browser. No values are stored or transmitted.
How it works
Population variance: σ² = Σ(x−μ)² / N
Sample variance: s² = Σ(x−x̄)² / (N−1)
Examples
- Population example: 2, 4, 4, 4, 5, 5, 7, 9 → variance = 4
- Use sample mode when your values are only part of a larger group
FAQ
- What is variance?
Variance measures how far values are spread from the mean. It is the average squared deviation from the mean.
- What is the difference between sample and population variance?
Population variance divides by N. Sample variance divides by N−1 to estimate the variance of a larger population.
- Why is variance squared?
Variance uses squared deviations so positive and negative differences do not cancel each other out.
- Are my values stored?
No. All calculations run locally in your browser and are not sent to a server.