=DATEDIF(DOB,TODAY(),"Y")
for years where DOB is the cell with the birth date
see
http://www.cpearson.com/excel/datedif.aspx
for more info
--
Regards,
Peo Sjoblom
"Carly" wrote in message
...
I have a list of 3600 birthdates and I need a formula to calulate ages.