✨ Free Online Tool

Standard Deviation Calculator

Free online Standard Deviation Calculator tool. Fast, secure, and easy to use. No registration required.

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Built by Experts

Neeraj Kumar

IT & Devloper Engineer

Neeraj Kumar is an IT professional with over 10 years of experience in networking and developing high-performance web applications. development is his passion.

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✨ Free Online Tool

Standard Deviation Calculator

Input Data

Enter Numbers

Support for comma, space, and newline delimiters.

Calculation Type

Enter numbers to see statistical analysis

What is Standard Deviation?

It measures the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean, while a high standard deviation indicates that the values are spread out over a wider range.

Sample vs Population

Use Sample (n-1) if your data represents a portion of a larger group. Use Population (n) if your data contains every member of the group you are studying.

Advanced Features

Get high-precision results, step-by-step math breakdowns, and complete descriptive statistics in one professional interface.