STDEV
TheSTDEV
function calculates the standard deviation of a set of numbers. It measures the amount of variation or dispersion of a set of values from the average (mean) value. It is commonly used in statistics to determine the spread of a data set. The values can be supplied as individual cells, ranges, or constants.
 How to use
STDEV
formula?  Examples of using
STDEV
formula STDEV
formula not working? Similar formulas to
STDEV
Usage
Use the STDEV
formula with the syntax shown below, it has 1 required parameter and 1 optional parameter:
 value1 (required):
The first value or range of cells to calculate the standard deviation for.  value2, ... (optional):
Additional values or ranges of cells to calculate the standard deviation for. Up to 30 arguments can be supplied.
Examples
Here are a few example use cases that explain how to use theSTDEV
formula in Google Sheets.
Calculating the standard deviation of a set of numbers
Suppose you have a set of numbers representing the heights of a group of people. You can use the STDEV
function to calculate the standard deviation of the heights, which will give you an idea of how spread out the heights are from the average height.
Comparing the spread of two data sets
You can use the STDEV
function to compare the spread of two data sets. For example, you may want to compare the spread of heights for two different groups of people to see if they have similar variability.
Detecting outliers in a data set
The STDEV
function can be used to identify outliers in a data set. If a value falls more than one standard deviation from the mean, it is considered an outlier.
Common Mistakes
STDEV
not working? Here are some common mistakes people make when using the STDEV
Google Sheets Formula:
Incorrect range or reference
One common mistake when using the STDEV
formula is to use an incorrect range or reference. Make sure that the range or reference you are using is correct and includes all the values you want to include in the calculation.
Using the wrong formula for the population
Another common mistake is to use the STDEV
formula instead of the STDEVP
formula when working with an entire population of data. The STDEVP
formula should be used in this case.
Using nonnumeric values
The STDEV
formula can only be used with numeric values. If you try to use it with text or other nonnumeric values, it will return an error. Make sure that all the values you are using in the calculation are numeric.
Related Formulas
The following functions are similar to STDEV
or are often used with it in a formula:

AVERAGE
The AVERAGE function calculates the average (arithmetic mean) of the values passed to it. It is commonly used to find the average of a range of cells containing numerical data.

MEDIAN
The
MEDIAN
function returns the median (middle) value of a set of numbers. It is commonly used to find the middle value in a range of data points. If the number of data points is even, it returns the average of the two middle values. This function can be useful in statistical analysis and data visualization. 
MIN
The
MIN
formula is a statistical function that returns the smallest value in a set of numbers. It is commonly used to find the minimum value from a range of cells or a list of values. 
MAX
The
MAX
function returns the maximum value from a range of cells or a set of supplied values. It is commonly used to find the largest value in a dataset. 
VAR
The
VAR
formula calculates the variance of a set of numerical values. Variance is a measure of how spread out a set of data is in relation to the mean. This formula is commonly used in statistical analysis to measure the variability or diversity of a dataset.
Learn More
You can learn more about the STDEV
Google Sheets function on Google Support.