How to Use STDEV Function in Excel (With Examples)

Ever wanted to calculate the standard deviation with a straightforward Excel formula? Look no further. In this blog post, we will walk through the basics of STDEV and show you how to use it in your work. Let’s get started!

Calculating Standard Deviation in Excel

Standard deviation is a number that tells you how far numbers are from their mean. For example, if we have a set of numbers with a mean of 15 and the standard deviation is 0, this means that all the numbers in the set are exactly the same as the mean (15).

On the other hand, in a set of numbers (16, 14, 16, 14), the standard deviation is 1.154. This means that the numbers in the set are not exactly the same as the mean and vary by a certain amount.

To calculate standard deviation in Excel, you will need to follow these steps:

  1. In our example, we will calculate the mean for A, B, and C columns separately. Each column has a set of numbers. Select the cells for which you want to calculate the standard deviation.
  2. Type in the formula “=STDEV()” and select the cell range of a specific column within the parenthesis. Such as, for Column A, we will type “=STDEV(A2:A5)“.
  3. Press Enter, and it will show the standard deviation of your selected cells. You can drag the formula to other columns to calculate their standard deviation.


Standard deviation can be used to analyze data and understand how much the numbers in a set vary from the mean. By understanding the standard deviation, we can see how much a set of numbers is spread out and how much they vary from the mean. This can be useful when analyzing and making decisions based on that data.

We hope this blog post has been helpful in understanding standard deviation and how you can use it to explore data in Excel.