Math
Standard Deviation Calculator
Calculate population and sample standard deviation for six values.
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How this calculation works
Calculate population and sample standard deviation for six values. Enter your values, select Calculate, then review the result. You can change any value and calculate again.
Formula used
σ = √(Σ(x − μ)² ÷ N) · s = √(Σ(x − x̄)² ÷ (n − 1))
Good to know
Results are estimates for informational purposes.
Example calculation
For 2, 4, 4, 4, 5, 5: population σ = 1
How to use this calculator
- Enter your values, select Calculate, then review the result. You can change any value and calculate again.
- Check units and time periods before comparing two results.
- Change one input at a time to understand its effect.
Frequently asked questions
What does the Standard Deviation Calculator calculate?
Calculate population and sample standard deviation for six values. The result is calculated from the values you enter and the formula shown on this page.
Which assumptions does the Standard Deviation Calculator use?
It applies σ = √(Σ(x − μ)² ÷ N) · s = √(Σ(x − x̄)² ÷ (n − 1)). Values, fees, rules or timing not represented by an input are not added automatically.