Standard Deviation

Calculate sample and population standard deviation (σ), variance, and mean.

Values should be separated by commas, spaces, or newlines.


Standard Deviation Calculator – Calculate Sample & Population σ, Variance, and Mean

A standard deviation calculator is a powerful online tool that helps you analyze data sets by calculating sample and population standard deviation (σ), variance, and mean quickly and accurately. Our free online standard deviation calculator simplifies complex statistical calculations, making it easy to understand and interpret data.


Whether you are a student studying statistics, a teacher verifying results, or a professional analyzing data, this statistics calculator online provides fast and reliable results for all your statistical needs.


What Is Standard Deviation?

Standard deviation (σ) is a key statistical measure that quantifies the amount of variation or dispersion in a set of numbers. A low standard deviation means the values are close to the mean, while a high standard deviation indicates that the data points are spread out over a wider range.

Standard deviation is commonly used in statistics, finance, research analysis, and quality control.


What Is a Standard Deviation Calculator?

Our online tool automatically performs the heavy lifting for your statistical analysis, instantly providing:

  • Sample Standard Deviation (s) – Used for a subset of a larger group.
  • Population Standard Deviation (σ) – Used for an entire data population.
  • Variance – The square of the standard deviation.
  • Mean (Average) – The arithmetic average of your data set.

Why Use an Online Standard Deviation Calculator?

Fast and Accurate

Calculates σ, s, variance, and mean instantly, saving you from long manual formulas.

Reduces Manual Errors

Statistical formulas are complex; using a digital tool ensures precision for every data set.

Free & Accessible

No registration required. Works perfectly on smartphones, tablets, and desktop computers.

Instant Data Insight

Perfect for students, teachers, data analysts, and researchers across all fields.


How to Use the Standard Deviation Calculator

  1. Enter your data set separated by commas, spaces, or line breaks.
  2. Select whether your data represents a sample or a population.
  3. Click the Calculate button.
  4. Instantly view the mean, variance, and standard deviation results.

Make data analysis effortless!

Try the standard deviation calculator today and get precise results for your assignments or research projects.