Standard Deviation Calculator
Standard deviation is the square root of variance — the typical distance of values from the mean.
Calculator
Standard Deviation Calculator
Result
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Formula
σ = √(Σ(x − μ)² ÷ n)
Step-by-step
- 1
Enter values
List your numbers, separated by commas.
- 2
Read the σ
The result quantifies spread around the mean.
Worked example
Example input: numbers: 2,4,6
Result: 1.633
Related tools
- Variance Calculator
Squared spread of the data.