#### Using COUNTIF within time range

The COUNTIF function in Excel can be used to count the number of cells in a range that meet a specific criteria. This criteria can be a number, text string, cell reference, or expression.

To count the number of times in a range that fall within a specific time range, you can use the COUNTIF function with a criteria that compares the times to the start and end times of the range.

For example, the following formula will count the number of times in column A that fall between 8:30 AM and 9:00 AM:

=COUNTIF(A:A, “>=”&TIME(8,30,0),A:A, “<“&TIME(9,0,0))

The first criteria in the formula, “>=”&TIME(8,30,0), tells the COUNTIF function to count only the cells in column A that contain a time that is greater than or equal to 8:30 AM.

The second criteria in the formula, <“&TIME(9,0,0), tells the COUNTIF function to count only the cells in column A that contain a time that is less than 9:00 AM.

The COUNTIF function will then return the number of cells in column A that meet both criteria.

You can also use the COUNTIF function to count the number of times in a range that fall within a time range that is relative to the current time. For example, the following formula will count the number of times in column A that fall within the past hour:

=COUNTIF(A:A, “>=”&NOW()-1/24)

The NOW() function returns the current date and time. The -1/24 subtracts one hour from the current time. The COUNTIF function will then count only the cells in column A that contain a time that is greater than or equal to one hour ago.