Variance Calculator
Calculate the variance of a dataset.
About this calculator
The Variance Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to calculate the variance of a dataset. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.
Formula used
Var = Σ(xᵢ − mean)² / n (or /(n−1) for sample)
What you'll need
- Numbers (e.g. 2, 4, 4, 4, 5, 5, 7, 9)
What you'll get
- Population Variance
- Sample Variance
Formula
Var = Σ(xᵢ − mean)² / n (or /(n−1) for sample)
Result
Frequently Asked Questions
Variance vs SD? +
SD is the square root of variance; SD is in the same units as the data, variance in squared units.
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