SuperCalX

Z-Score Calculator

Calculate standard score.
Calculator
Enter your values
Results
Z-Score
1.00
Analysis
Interpretation of the current calculator output

Calculation Summary

The current inputs have been processed for the z-score calculator. Review the results panel for the computed output and use the charts tab to compare the current values visually.

How to Read It

The main result shows the direct answer for your current inputs. Supporting sections below explain the method, example, and common questions so the result is easier to interpret.

How to Use

Step-by-step instructions
  1. 1Enter the value.
  2. 2Enter the mean.
  3. 3Enter the standard deviation.
  4. 4View the z-score.

Z-Score

Measures how many standard deviations a value is from the mean.
z = (x - μ) / σ

Variables:

xValue
μMean
σStandard deviation

Example

Test Score

Inputs:

Score:115
Mean:100
SD:15

Steps:

  1. 1.z = (115 - 100) / 15
  2. 2.z = 1.0
Result:
1.0

Frequently Asked Questions

What does a z-score mean?

z = 0 is average, z = 1 is one SD above average, z = -1 is one SD below.