Standard Deviation Calculator

Paste or type a list of numbers, and Standard Deviation Calculator gives the standard deviation for a sample and for a whole population, along with the variance, mean, count and sum of squares. Numbers can be separated by commas, spaces, semicolons or new lines.

What you get

• Sample standard deviation (divides by n - 1) and population standard deviation (divides by n)

• Variance for both versions

• Mean, count and sum of squares

• Paste a column from a spreadsheet straight into the data set

Where it helps

• Statistics homework and checking your own arithmetic

• Measuring how spread out test scores or sensor readings are

• Quality checks on repeated measurements

• Deciding whether to use sample or population formulas

Made for daily use

• Light and dark theme

• 28 languages, with right-to-left layout where it belongs

A rebuilt app

Standard Deviation Calculator was rebuilt from the ground up on the Calculator.io calculator engine. A More calculators link opens the full Calculator.io app, with 170+ tools for math, money, health and dates.

The app is supported by banner ads.