## How to use the STDEV function

*Article updated on February 22, 2018*

The STDEV function calculates the standard deviation of a group of values. Standard deviation shows how much the values differ from the mean value of the group.

Formula in cell C3:

=STDEV(B3:B14)

### Excel Function Syntax

STDEV(*number1*,*[number2]*,...)

### Arguments

number1 |
Required. This argument can be an array of constants or a cell reference to a group of values. |

[number2] |
Optional. Up to 254 additional arguments. |

### Comments

There are newer better functions that may have improved accuracy, this function is available for compatibility with earlier Excel versions.

### Functions in 'Compatibility'

The STDEV function function is one of many functions in the 'Compatibility' category.

The CONFIDENCE function calculates the confidence interval for a population mean, using a normal distribution. Formula in cell B6: =CONFIDENCE(B3, […]

The FLOOR function rounds a number down, toward zero, to the nearest multiple of significance. Excel Function Syntax FLOOR(number, significance) Arguments […]

The MODE function calculates the most frequent number in a cell range. Number 4 exists 3 times on picture above […]

The RANK function calculates the rank of a specific number compared to a list of numbers. Formula in cell C3: […]

The STDEV function calculates the standard deviation of a group of values. Standard deviation shows how much the values differ from the […]