How this calculator works
Enter the values for first value, second value and review the units before calculating.
Formula / method
σ = √(Σ(x − μ)² ÷ n)
Worked example
For 2, 4 and 6, the population standard deviation is about 1.63.
Assumptions and limitations
The values represent the full population being described.
Use the sample version when the values represent a sample from a larger population.