Time Calculation in Excel - Easy Excel Tutorial

Time Calculatio
	Excel can work with time very easily.
	Time can be entered in various different formats and calculations performed.
	There are one or two oddities, but nothing which should put you off working with it.
	See the TimeSheet example for an example.
	Typing time
	When time is entered into worksheet it should be entered with a colon between
	the hour and the minutes, such as 12:30, rather than 12.30 Excel can cope with either the 24 hour system or the am/pm system. To use the am/pm system you must enter the am or pm after the time. You must leave a space between the number and the text. Finding the difference between two times You can subtract two time values to find the length of time between. Formatting time When time is added together the result may go beyond 24 hours. Usually this gives an incorrect result, as in the example below. To correct this error, the result needs to be formatted with a Custom format. How To Apply Custom Formatting The custom format for time use a pair of square brackets [hh] on either side of the hours indicators. 1. Click on the cell which needs the format. 2. Choose the Format menu. 3. Choose Cells. 4. Click the Number tag at the top right. 5. Choose Custom. 6. Click inside the Type: box. 7. Type [hh]:mm as the format. 8. Click OK to confirm.