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!)

You can put this all together in one calculation, which creates a text version.

Age is 51 Years, 2 Months and 30 Days

**="Age is "&DATEDIF(C8,TODAY(),"y")&" Years, "&DATEDIF(C8,TODAY(),"ym")&" Months and "&DATEDIF(C8,TODAY(),"md")&" Days"**

__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.