Calculators

Standard Deviation Calculator

Population & sample standard deviation.

Numbers (separated by commas, spaces or new lines)

—

Population σ

—

Sample s

—

Variance (pop.)

—

Variance (sample)

—

Std error (SEM)

—

Mean

—

Median

—

Min

—

Max

—

Range

—

Sum

—

Count

▸ Step-by-step working

xᵢ	xᵢ − x̄	(xᵢ − x̄)²

This free standard deviation calculator computes both population (σ) and sample (s) standard deviation from a list of numbers, along with the variance, mean, sum and count. Use population when you have every data point, and sample when working from a subset. All calculations run in your browser.