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Excel GEOMEAN Function

Excel GEOMEAN function

The Excel GEOMEAN function returns the geometric mean for a set of numeric values. Geometric mean can be used to calculate average rate of return with variable rates.

Calculate geometric mean
Return value 
Calculated mean
=GEOMEAN (number1, [number2], ...)
  • number1 - First value or reference.
  • number2 - [optional] Second value or reference.
Usage notes 

The Excel GEOMEAN function calculates the geometric mean. Geometric mean is the average of a set of products — technically, the nth root of n numbers. The general formula for the geometric mean of n numbers is the nth root of their product. The equation looks like this:


For example, given two numbers, 4 and 9, the long-hand calculation for the geometric mean is 6:


The GEOMEAN function returns the same result:

=GEOMEAN(4,9) // returns 6

By contrast, the arithmetic mean is 6.5:


The GEOMEAN function takes multiple arguments in the form number1number2number3, etc. up to 255 total. Arguments can be a hardcoded constant, a cell reference, or a range. Often, a single range or array is used instead of multiple arguments, as seen in the example worksheet.


In the example shown, GEOMEAN is used to calculate a compound annual growth rate. To do this we use the growth factor values in column D in the GEOMEAN function, then subtract 1. The formula in G7 is:



  • Arguments can be numbers, names, arrays, or references that contain numbers.
  • Empty cells, and cells that contain text or logical values are ignored.
  • If any provided values are less than or equal to zero, GEOMEAN returns #NUM!

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