Documentation/How Tos/Calc: YEARFRAC function
From Apache OpenOffice Wiki
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.
