Z-Score (Standard Score) Calculator
Find how many standard deviations a value is from the mean.
Result
z = 1,5
Z-score: 1.5 (above the mean)
Result in all units
Step-by-step solution
z = (x − μ) / σ
What Is a Z-Score?
A z-score shows how many standard deviations a value is from the mean. It allows you to compare data on different scales.
How is it calculated?
How Is It Calculated?
z = (value − mean) ÷ standard deviation
- Enter the value, the mean and the standard deviation.
A positive z indicates above the mean, a negative z indicates below it.
Frequently Asked Questions
What is a z-score used for?
It determines the position of a value within a distribution and allows data in different units to be compared on a common scale.