Calculatorism

Z-Score Calculator

Compute the standard score z = (x − μ) / σ.

Input Data

Value
Mean
Std

Results

1
84.1%

At a glance:z = (x − μ)/σ standardizes x to the number of standard deviations from the mean. Complements standard-deviation and normal-distribution.

Formula

z = (x − μ) / σ.

How to Use

  1. Enter x, mean and std dev.
  2. The tool returns the z-score.

Case Studies

x=115, μ=100, σ=15

z = 1 (one SD above mean).

FAQ

Negative z?

Means the value is below the mean.

Related Tools

References

Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:Z-Score Calculator（/math/z-score）。