GEOMEAN

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: By contrast, the arithmetic mean is 6.5: The GEOMEAN function takes multiple arguments in the form number1, number2, number3, 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.