TFT

Standard Deviation Calculator

Calculate population and sample standard deviation

How to Calculate Standard Deviation

1
Enter Data

Input your numbers separated by commas.

2
Calculate

Click calculate to compute statistics instantly.

3
View Results

See population and sample standard deviation.

Standard Deviation Formulas

Population: σ = √(Σ(x - μ)² / N)

Sample: s = √(Σ(x - x̄)² / (n - 1))

Where μ = mean, N = population size, n = sample size

Population σ

Use when you have data for the entire population.

Sample s

Use when working with a sample to estimate population parameters.