Standard Deviation Calculator
Standard Deviation Calculator helps you calculate population standard deviation quickly with transparent formulas.
Formula
σ = sqrt(Σ(x-μ)^2/N)
Step-by-step
- Compute mean.
- Compute average squared deviation.
- Take square root.
Example
Using default values, result: Std Dev 1.41
Frequently asked questions
How accurate is the Standard Deviation Calculator?
Results are estimate-grade and depend on your inputs and assumptions.
Can I use Standard Deviation Calculator for professional decisions?
Use this as guidance and verify with a qualified professional when stakes are high.
For educational purposes only. Results are estimates, not professional advice.
Last reviewed: 2026-07-14