Variance Calculator
Calculate variance and standard deviation from a list of numbers.
Quick stats
Paste numbers → choose sample/population → get σ² and σ instantly.
Output: σ² + σHandles commas/spaces/new lines
Tip: you can paste from Excel (columns/rows).
When to use
- Sample: data is a subset of a larger group
- Population: data covers the whole group
Variance
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Symbol
σ² / s²
Std. deviation
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Mean
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Count
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Sum
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Min
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Max
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Enter numbers to see detailed stats.
Result—
Example: 2 4 4 4 5 5 7 9 → variance ≈ 4
Formula
Population: σ² = Σ(x − μ)² / N • Sample: s² = Σ(x − x̄)² / (n − 1)