Standard Deviation Calculator
Measure how spread out a set of numbers is. A low standard deviation means values cluster near the average; a high one means they are widely scattered.
Inputs explained
- Numbers (comma-separated) — Your data set, separated by commas. Example: 10, 12, 23, 23, 16, 23, 21, 16.
How to use it
- Fill in the fields above — each input has a hint describing exactly what to enter
- Press Calculate to get your result instantly, right on this page
- Copy the result, save the tool to favorites, or share and embed it anywhere
Understanding the result
Example: For 10, 12, 23, 23, 16, 23, 21, 16 the population standard deviation is about 4.9.
Frequently asked questions
Is the Standard Deviation Calculator free to use? Yes — it is completely free, with no sign-up, no download and no usage limits. You can use it as often as you need.
Is my data private? Yes. The calculation runs entirely in your browser — the values you enter are never sent to our servers, stored or shared with anyone.
What information do I need? Just the following: Numbers (comma-separated). Each field includes a hint explaining exactly what to enter.
Can I use it on my phone? Yes — the tool is fully responsive and works on any device, and the same calculator is available in the EasyWorkCalcs mobile app.
Privacy
Everything you enter into the Standard Deviation Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.