Do I need to sign up?

No. The tool works without an account.

Are my data uploaded?

Compatible operations run locally in the browser.

Sample uses divisor n−1 (Bessel's correction). Population uses n. Use sample when your data is a subset.

At least 2 valid numbers. Separate with commas or spaces.

Calculate sample or population standard deviation from a list of numbers.

Standard deviation

2.1381

Mean: 5.0000 · Variance: 4.5714 · n = 8

Numbers (comma or space separated)

Sample (n − 1)Population (n)

Formula: √(Σ(x − μ)² / (n − 1)) for sample; divisor n for population.

Examples

2, 4, 4, 4, 5, 5, 7, 9 (sample) → ~2.1381

10, 12, 23, 23, 16, 23, 21, 16 (sample) → ~5.2372

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Recommended next step

After using Standard Deviation Calculator, continue with Arithmetic Mean Calculator.

Tools selected to complete the same task.

4 steps

Tool guide

Practical information to understand the result and use this tool correctly.

Calculate sample or population standard deviation from a list of numbers.

The tool runs directly in the browser for immediate results.

Do I need to sign up?: No. The tool works without an account.
Are my data uploaded?: Compatible operations run locally in the browser.
Sample vs population?: Sample uses divisor n−1 (Bessel's correction). Population uses n. Use sample when your data is a subset.
How many numbers?: At least 2 valid numbers. Separate with commas or spaces.