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This function returns the harmonic mean of a data set.
HARMEAN(number1, [number2], ...)
This function has these arguments:
Argument | Description |
|---|---|
number1, number2, ... | Number1 is required, subsequent numbers are optional. 1 to 255 arguments for which you want to calculate the mean. You can also use a single array or a reference to an array instead of arguments separated by commas. |
The harmonic mean is always less than the geometric mean, which is always less than the arithmetic mean.
The equation for this function is:

HARMEAN(F1:F9)
HARMEAN(R1C6:R9C6)
HARMEAN(35,31,47,51,37,31,58,39) gives the result 39.2384929823