About the Standard Deviation Calculator
Paste or type a list of numbers to get standard deviation and other descriptive statistics instantly. Choose sample (n − 1) or population (n), and see the mean, median, mode, variance, range and standard error.
How to use it
- Enter numbers separated by commas, spaces or new lines.
- Choose sample or population.
- Read the statistics.
Formula & method
Population σ = √(Σ(x − μ)² ÷ N)
Sample s = √(Σ(x − x̄)² ÷ (n − 1))Frequently asked questions
Should I use sample or population?
Use population when your data includes every member of the group. Use sample when your data is a subset used to estimate a larger group — the most common case.
Results are estimates for general information only and are not financial, tax, legal or medical advice. Please confirm important decisions with a qualified professional.