COUNT function
The COUNT function counts the number of cells that contain numbers, and counts numbers within the list of arguments. Use the COUNT function to get the number of entries in a number field that is in a range or array of numbers. For example, you can enter the following formula to count the numbers in the range A1:A20: =COUNT(A1:A20). In this example, if five of the cells in the range contain numbers, the result is 5.
Syntax
COUNT(value1, [value2], ...)
The COUNT function syntax has the following arguments:

value1 Required. The first item, cell reference, or range within which you want to count numbers.

value2, ... Optional. Up to 255 additional items, cell references, or ranges within which you want to count numbers.
Remarks

Arguments that are numbers, dates, or a text representation of numbers (for example, a number enclosed in quotation marks, such as "1") are counted.

Logical values and text representations of numbers that you type directly into the list of arguments are counted.

Arguments that are error values or text that cannot be translated into numbers are not counted.

If an argument is an array or reference, only numbers in that array or reference are counted. Empty cells, logical values, text, or error values in the array or reference are not counted.

If you want to count logical values, text, or error values, use the COUNTA function.

If you want to count only numbers that meet certain criteria, use the COUNTIF function or the COUNTIFS function.
Example
Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.