Try Calculators

Calculate standard deviation

Population standard deviation σ for a data set.

Also known as: calculate standard deviation calculator, standard deviation calculator, calculate standard deviation, statistics math, statistics calculate standard deviation

Inputs

Results update when you click Calculate.

Population σ

4.8990

Variance σ²

24.0000

Mean

18.0000

Ad · below results slot

Recently used

Tools you open will show up here on this device — with your last inputs when available.

What this result means

Population standard deviation σ for a data set. σ = √σ² where σ² is population variance.

Assumptions

  • Rule dependency: Universal formula.

How is it calculated?

σ = √σ² where σ² is population variance.

Example

σ summarizes typical distance from the mean.

Frequently asked questions

Sample SD?+

Sample SD divides by N−1 before the square root.