YEARFRAC(start_date,end_date,basis) returns the year fraction representing the number of whole days between start_date and end_date : YEARFRAC « Date Time functions « Microsoft Office Excel 2007 Tutorial

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15.19.1.YEARFRAC(start_date,end_date,basis) returns the year fraction representing the number of whole days between start_date and end_date

If basis = 0 or omitted, Day count basis is US (NASD) 30/360.

If basis = 1, Day count basis is Actual/actual.

If basis = 2, Day count basis is Actual/360.

If basis = 3, Day count basis is Actual/365.

If basis = 4, Day count basis is European 30/360.

Input the formula: =YEARFRAC("1/1/2007", "7/30/2007", 2). Press Enter to get the result.

15.19.YEARFRAC
	15.19.1.	YEARFRAC(start_date,end_date,basis) returns the year fraction representing the number of whole days between start_date and end_date
	15.19.2.	Use the YEARFRAC function to calculate the number of years between two dates.
	15.19.3.	Return the age of the person whose date of birth you enter into cell A1

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