Z-Score Calculator
Calculate a z-score — how many standard deviations a value is from the mean.
Inputs explained
- Value — The data point you are measuring. Example: 85.
- Mean — The average of the data set. Example: 70.
- Standard Deviation — The spread of the data set. Example: 10.
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: A value of 85 with mean 70 and SD 10 has a z-score of 1.5.
Frequently asked questions
Is the Z-Score 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: Value, Mean, Standard Deviation. 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 Z-Score Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.