Z-Score Calculator
Calculate the standard score (Z-score) to find how many standard deviations a value is from the mean.
In-Depth Guide
Everything you need to know
Standardized Scores
The Z-Score (or Standard Score) tells you how many standard deviations a data point is from the mean. It's a universal way to compare values across different datasets with different units.
Statistical Significance
Easily identify outliers. A Z-score greater than 2 or less than -2 is typically considered unusual, while a score of 0 indicates the value is exactly at the mean.
Interpretation Guide
Z = 0The value is exactly average
Z > 0The value is above average
Z < 0The value is below average
|Z| > 2Statistically unusual (Outlier)