Z Score Calculator

Random Value (X)
Sample Mean (µ)
Sample Standard Deviation (σ)

Result:
Z Score Value

Z Score Calculator to compare the relative standings of items. All the items from distributions with different means and/or different standard deviations.

Z Score Formula

Standard Z Score Calculation Formula

where

σ is the standard deviation of the population

μ is the mean of the population

x is a raw score to be standardized