
Add a custom field and use one of the following formulas to calculate the age.
Using (Now() - [Birthday] ) /365 rounds the age to the closest age... less than 6 months until the next birthday and it reports the age at the next birthday, not the current age.
Example:
The birth date is 8/15/1961. The short formula displays the age as
39, since the age is more than 38.5 years. (Today is 4/1/2000.)
This longer formula gives the exact date.. the age doesn't change until the birthday.
Download age contact example as a template or a zip
To change existing forms to use the Age form, try DocMessageClass, a free utility used to change forms used on Outlook items.