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Standard deviation calculator
Sample and population standard deviation, variance and standard error of a list of numbers.
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- Works on any device
About Standard deviation calculator
Paste a list of numbers to get sample and population standard deviation, variance and standard error. Use the sample version, dividing by n - 1, when your data is a subset of a larger group, and the population version, dividing by n, when you have every value.
How to use Standard deviation calculator
- Enter your numbers above.
- The result updates instantly as you type.
- Change any value to compare different cases.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
Should I use sample or population standard deviation?
Use sample when your numbers are only a part of a bigger group, which is most real cases. Use population only when the list covers every member.
Is Standard deviation calculator free?
Yes. Standard deviation calculator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.