Related Function:

The STDEVA function returns an estimate standard deviation based on a sample. The standard deviation is a measure of how widely values are dispersed from the average, or mean, value.


=STDEVA(num_1,[num_2], … )

Note: Beginning with Excel 2007, you can enter up to 255 number arguments to the function. Excel 2003 would only accept up to 30 number arguments.


Argument Description
num_1 The first number, cell references or range argument corresponding to a population
[num_2], … Optional. Additional numbers, cell references or ranges for which you want the skew, up to a maximum of 255

Note: The STDEVA function is used when calculating the standard deviation for a sample of a population, e.g. if your data set records the individual heights of a sample of males. If you are calculating the standard deviation of an entire population, you should use the STDEVP or the STDEVPA function.


  A B C D
1 Data      
2 10,647      
3 10,677      
4 17,193      
5 14,162      
6 11,609      
7 17,381      
8 10,292      
10 Formula Result Notes
11 =STDEVA(A2:A8) 3,114.317 Standard deviation of values provided in cells A2:A8

Common Function Error(s)

Problem What went wrong
a Occurs  if any values that are supplied directly to the function are text values that cannot be interpreted as numeric values
#DIV/0! Occurs if fewer than two numeric values are supplied to the function

Standard deviation is a statistical measure, that is closely linked to the variance. Both measures are commonly used across a set of values, to identify the amount the values differ, or deviate, from the average value.

Standard deviation is give by the square root of the variance, i.e.:    

    \[    \sqrt { \sum \frac { (x - \bar{x})^2 }{ (n-1) } }    \]


  • x is the sample mean
  • n is the sample size

See Wikipedia for more information on standard deviation.