Standard Deviation Calculator
Measure how spread out a data set is. Enter your numbers to get the mean, variance and both the population (σ) and sample (s) standard deviations.
Standard Deviation Calculator
MathMean, variance and population/sample standard deviation.
Standard deviation
e.g. 10, 12, 23, 23, 16
Sample std deviation
5.2372
- Count
- 8
- Mean
- 18
- Population SD (σ)
- 4.899
- Sample SD (s)
- 5.2372
- Variance (sample)
- 27.4286
Frequently asked questions
Population vs sample standard deviation?
Use population (÷ n) when your data is the whole population, and sample (÷ n−1) when it's a sample drawn from a larger population.
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