Standard Deviation Calculator

Calculate mean, variance, and standard deviation of a data set.

Data Set (comma separated)

Type

Sample Population

Results

Count (n):

Mean (μ):

Variance (σ²):

Std Dev (σ):

What is this Online Standard Deviation Calculator for?

The Standard Deviation Calculator computes key statistical properties of a dataset: Count, Mean (Average), Variance, and Standard Deviation. It supports both Sample and Population calculations.

How does it work?

It calculates the mean, finds the squared difference of each point from the mean, sums them up, and divides by N (Population) or N-1 (Sample) to find the variance. The square root of variance is the standard deviation.