What does the Standard Deviation Calculator work out?

Spread of a data set, population and sample. It is one of the Math tools on Mondo Knows.

How is the Standard Deviation Calculator calculated?

You get an instant answer with the working shown underneath.

Do I need to sign up, and is my data stored?

No sign-up, and nothing you type is sent anywhere. The calculation runs in your own browser, so the figures stay on your device and the page works offline once loaded.

Mondo Knows Tools

Standard Deviation Calculator

Spread of a data set, population and sample. Use the free standard deviation calculator below to get an instant answer, with the formula shown so you can check the maths and trust the result. Free, private, and no sign-up.

ValuesSeparate with commas, spaces or new lines.

Mondo says

Population standard deviation

12.315302

Sample standard deviation13.490738

Population variance151.666667

Sample variance182

Mean18

Count6

Standard Deviation Calculator: common questions

What does the Standard Deviation Calculator work out?: Spread of a data set, population and sample. It is one of the Math tools on Mondo Knows.
How is the Standard Deviation Calculator calculated?: You get an instant answer with the working shown underneath.
Do I need to sign up, and is my data stored?: No sign-up, and nothing you type is sent anywhere. The calculation runs in your own browser, so the figures stay on your device and the page works offline once loaded.

Mondo also knows

Average CalculatorMean, median, mode and range of any list.➗ Math Z-Score CalculatorHow many standard deviations a value sits from the mean.➗ Math Confidence Interval CalculatorRange that likely contains the true mean.➗ Math Statistics CalculatorA full summary of a data set in one pass.➗ Math

Estimates for general guidance only. This is not financial, medical or legal advice. Everything runs in your browser and nothing you type is stored.