Z-Score Calculator
Convert between raw scores, Z-scores, and percentiles.
Calculation Mode
The value you want to convert
Average of the distribution
Spread of the distribution
Normal Distribution
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Z-Score
0
z = (85 - 75) / 10
Z-Score
0
Standard deviations from μ
Percentile
0%
% below this value
Raw Value
0
x = μ + zσ
Interpretation
This value is 0 standard deviations above the mean. Only 0% of values are lower than this.
Documentation
Understanding Z-Scores
A Z-score standardizes values from any normal distribution to the standard normal distribution (mean=0, SD=1), allowing comparison across different scales.
Z-Score
Raw from Z
Percentile
Frequently Asked Questions
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