📐 Z-Score Calculator
Z-score and percentile for any data point
About this calculator
A z-score tells you how many standard deviations a value sits from the mean, which makes scores from different scales comparable. This calculator also converts the z-score to a percentile, so you can say exactly what share of values fall below yours.
Tip: z-scores beyond plus or minus 3 are rare in normal data and worth double checking for data entry errors.