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In need to find the age in days - months - years in OpenOffice.

There is DATEDIF() in Microsoft Excel. You can use it to find the difference in days/months/years between two dates.

Age Calculation 
    You can calculate a persons age based on their birthday and todays date.
    The calculation uses the DATEDIF() function.        
    The DATEDIF() is not documented in Excel 5, 7 or 97, but it is in 2000. 
    (Makes you wonder what else Microsoft forgot to tell us!)   
    Birth date :    01-Jan-60       
    Years lived :   52   =DATEDIF(C8,TODAY(),"y")   
    and the months :    4    =DATEDIF(C8,TODAY(),"ym")
    and the days :  30   =DATEDIF(C8,TODAY(),"md")

One can calculate by below formula, but it is cumbersome to calculate months.

Another way to calculate age         
This method gives you an age which may potentially have decimal places representing the months.
If the age is 20.5, the .5 represents 6 months.             
Birth date :    01-Jan-60
Age is :    52.41    =(TODAY()-C23)/365.25
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Did you check your post's formatting before you submitted it? Please check the preview area. – slhck May 31 '12 at 9:59

Just use the YEARS() and MONTHS() function from the set of Date/Time functions:




will give you the sum of years and months elapsed. To get the remainder months from the years sum, just use modulo (in Calc: MOD()):

=MOD(MONTHS(01-Jan-60,NOW,1), 12)

will return the remaining 4 months after dividing the total sum of months by 12.

Of course, you can replace the dates that are included in the formulas above by cell references. =YEARS(A1,A2,1) assumes that cells A1 and A2 contain dates.

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