See this:

http://www.cpearson.com/Excel/datedif.aspx

--
Biff
Microsoft Excel MVP


"Debbie" wrote in message
...
I have a formula that determines a child's age by the month. I noticed
that today 9/16 one of our children turned 1 month old but the answer
still says 0. What is wrong with formula.
It would be nice if I had one formula instead of two. THe formula can
calculate age up to 6 weeks, the in months from 2 months up to 35
months, and then 3 years and up. Can anyone help me?

This is the formula I use for the months
=IF(C87="","",ROUNDDOWN(((TODAY()-C87)/365*12),0))''=


This is the formula I use for the 3 year olds and higher.
=IF(ROUNDDOWN(((TODAY()-B9)/365*12),0)=37,ROUNDDOWN(((TODAY()-B9)/
365*12),0),ROUNDDOWN(((TODAY()-B9)/365),0))

It would be nice to have one formula to calculate all scenarios.