Z-Score Calculator

Standardise a value against a distribution.

Enter values

Value (x)

Mean (μ)

Std dev (σ)

—

z = (x − μ) / σ

All calculations run locally in your browser and update instantly as you type.

What does a z-score mean?+

It tells you how many standard deviations a value is above (positive) or below (negative) the mean.

All calculations run locally in your browser. Nothing you type is sent to a server.