Z Score Calculator

Standardized Random Variable (X) :
Population mean (µ):
Population Standard Deviation(s):
Z-score / Standard Normal Score =


Z Score Calculator is a free online tool that displays the standard normal score. BYJU’S online Z score calculator tool makes the calculation faster, and it displays the Z score value in a fraction of seconds.

How to Use the Z Score Calculator?

The procedure to use the Z score calculator is as follows:

Step 1: Enter the random variable, mean and standard deviation in the respective input field

Step 2: Now click the button “Calculate” to get the result

Step 3: Finally, the Z score value will be displayed in the output field

What is Meant by the Z Score?

In Statistics, Z-score is also known as the standard normal score which gives information about how many standard deviations are away from the mean. Generally, the positive Z score represents the raw score which is higher than the average mean. Similarly, the negative Z-score represents the raw score which is below the average mean. For example, if the standard normal score is equal to +1, it means that the one standard deviation is above the mean.


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