Definition. This function returns the harmonic mean of a data set. The harmonic mean is the reciprocal of the arithmetic average of reciprocals.
number1 (required) and number2 (optional). At least one and up to 255 arguments (30 in Excel 2003 and earlier versions) for which you want to calculate the harmonic mean. You can also use a single array or a reference to an array instead of arguments separated by commas.
Arguments can be numbers, names, arrays, or references containing numbers. If an array or a reference argument contains text, logical values, or empty cells, those values are ignored. However, cells with the value 0 are included. If one of the numbers is less than or equal to 0, ...