CalculatorMath

Z-Score Calculator

Calculate how many standard deviations a value lies above or below a population mean.

Instant · no account

Input

Enter your values

Value

Mean

Standard deviation

Method

How it works

Change any input above and the result updates instantly. The formula or method used by this tool is shown below.

Z = (Value − Mean) ÷ Standard deviation

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Quick answers

About this tool

What does the Z-Score Calculator do?+

Calculate how many standard deviations a value lies above or below a population mean.

How does this calculator calculate the result?+

It uses this method: Z = (Value − Mean) ÷ Standard deviation

Are my inputs saved or sent to an account?+

Core CalcForge tools require no account, and most calculations run locally in your browser. Favorites and recent-tool history, when used, stay in this browser.