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.