Excel's Formula - sisman

Chapter 6: Working with Dates and Times 175
The formula returns an incorrect result if the contents of cell A1 do not contain four digits. The
following formula corrects the problem and returns a valid time for any military time value from
0 to 2359:
=TIMEVALUE(LEFT(TEXT(A1,”0000”),2)&”:”&RIGHT(A1,2))
The following is a simpler formula that uses the TEXT function to return a formatted string and
then uses the TIMEVALUE function to express the result in terms of a time:
=TIMEVALUE(TEXT(A1,”00\:00”))
Converting decimal hours, minutes, or seconds to a time
To convert decimal hours to a time, divide the decimal hours by 24. For example, if cell A1 contains
9.25 (representing hours), this formula returns 09:15:00 (9 hours, 15 minutes):
=A1/24
To convert decimal minutes to a time, divide the decimal hours by 1,440 (the number of minutes
in a day). For example, if cell A1 contains 500 (representing minutes), the following formula
returns 08:20:00 (8 hours, 20 minutes):
=A1/1440
To convert decimal seconds to a time, divide the decimal hours by 86,400 (the number of seconds
in a day). For example, if cell A1 contains 65,000 (representing seconds), the following formula
returns 18:03:20 (18 hours, 3 minutes, and 20 seconds):
=A1/86400
Adding hours, minutes, or seconds to a time
You can use the TIME function to add any number of hours, minutes, or seconds to a time. For
example, assume that cell A1 contains a time. The following formula adds two hours and 30 minutes
to that time and displays the result:
=A1+TIME(2,30,0)