Sample Variance Calculator
Calculate sample variance, sample standard deviation, mean, and dataset size from a list of values using the sample formula.
Enter values separated by commas, spaces, or line breaks.
Formula:
s² = Σ(x − x̄)² / (n − 1)
| Metric | Value |
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Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
How it works
Sample variance is used when the dataset represents a sample rather than the entire population. This is why the denominator is n − 1 instead of n.
Examples
- 12, 15, 18, 21, 24
- This page returns sample mean, sample variance, and sample standard deviation.
FAQ
- What is sample variance?
Sample variance measures spread in sample data and divides the sum of squared deviations by n − 1.
- What formula does this calculator use?
It uses sample variance: s² = Σ(x − x̄)² / (n − 1).
- Why divide by n − 1?
Dividing by n − 1 provides an unbiased estimate of population variance from a sample in many common settings.
- How many values do I need?
At least 2 numeric values are required.
- Are calculations stored?
No. Everything runs locally in your browser.