Z Score Calculator

Z Score Calculator allows you to easily calculate Z-Score by taking inputs of row score, population mean, and standard deviation.

About Z Score Calculator

Z Score Calculator is an easy-to-use and 100% accurate online tool to calculate the Z-Score. Just enter the row score, population mean, standard deviation and press the "Calculate" button. As a result, the tool will display the Z-score result on your screen. Also, it's very fast and efficient. The manual calculation is a bit confusing and becomes very difficult when we deal with large numbers. So, use our tool to save your time and effort.

Z Score Calculator

What is Z-Score?

In simple words, the Z score denotes the difference between the data points of raw scores from the mean value. You can get the number of standard deviations of a data point above the mean value. Hence, it is also known as Standard Score, Normal Score, or Z-Value.

Types of Z Score:

  • Positive Z Score: When the data point lies above the mean, then the Z score is said to be positive.
  • Negative Z Score: When the data point lies below the mean, then the Z score is said to be negative.

Now, as you have learned about the Z Score let's understand how you can calculate it.

How to Calculate the Z-Score?

According to statistical analysis, we use this formula to calculate the Z Score:

Z-Score Formula:

Z =  
(x - μ)

Z = Z Score
x = Raw Score
μ = Mean
σ = Standard Deviation

Hence, in order to calculate the Z score or standard score, firstly, you need to get the value of raw score, mean and standard deviation. After getting those values just put them in the formula and you will get the Z-score result easily.

Let's take an example.


Suppose, we have the following values:

Raw score, x = 20
Mean, μ = 15
Standard Deviation, σ = 5

Put these values in the formula and evaluate the expression.

Z =  
(x - μ)
(20 - 15)

= 1

Finally, we get Z Score value = 1.

Z Score Calculator takes all the required values from the user and determines the final result instantly. The same statistical formula is being used in our tool.

Features of Z Score Calculator

  • Fast: Undoubtedly, the tool is very fast and gives answers within a second.
  • Easy to use: Just input the values and get the answer. No effort! Most simplistic user interface.
  • No signup and Free: It's 100% free to use and requires no signup or registration.
  • Accurate: Our tool runs on predefined algorithms and it never gives false result.
  • Save time and effort: Manual calculations can take very much time and effort. Our tool makes it easier and faster..

How to use Z-Score Calculator?

Follow these simple steps below to use the tool without any problem:

  1. First of all, open the Z score calculator on any internet-accessible device.
  2. Fill the input boxes with numeric values. Also, you can use the up and down arrows on the right side of the input fields to increase or decrease the values.
  3. After entering the values just click on the "Calculate" button and the Z-score will be displayed on your screen.
  4. To again use the calculator just press the "Reset" button.