Documentation/How Tos/Calc: YEARFRAC function

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YEARFRAC

Returns the number of years including fraction between two dates.

This function is only available if the Analysis AddIn is installed.

Syntax:

YEARFRAC(startdate; enddate; basis)

returns the number of years between the startdate and enddate; basis is an integer specifying the system of how many days are in a month or year, as follows:
basis day counting system
0 US (NASD) system. 30 days/month, 360 days/year (30/360)
1 Actual/actual
2 Actual/360
3 Actual/365
4 European 30/360

Example:

YEARFRAC("2007-01-01";"2009-07-01";0)

returns 2.5.

YEARFRAC("2008-01-01";"2008-07-01";3)

returns 0.498630136986.

Issues:

  • Excel and Calc both produce slightly erroneous results in some circumstances.

See Also

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