Calculate z-score
Standardize a value: z = (x − μ) / σ.
Also known as: calculate z score calculator, z score calculator, calculate z-score, statistics math, statistics calculate z-score
Inputs
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Z-score
1.5000
z = (85.0000 − 70.0000) / 10.0000
Approx. percentile
93.32%
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What this result means
Standardize a value: z = (x − μ) / σ. z = (x − μ) / σ measures distance from the mean in standard-deviation units.
Assumptions
- Rule dependency: Universal formula.
How is it calculated?
z = (x − μ) / σ measures distance from the mean in standard-deviation units.
Example
85 with μ=70, σ=10 → z = 1.5.
Frequently asked questions
Normal required?+
Percentile hint assumes an approximate normal distribution.