One of the many features of Excel is being nosy. That's right, you can quickly calculate a persons age as long as you have their birth date.

We show you how to use Excel to count days between two dates using the DAYS, DATEDIF, NETWORKDAYS, and TODAY functions, and Subtraction.

An age calculator helps in determining the age of a person till a given date. The calculated result is displayed in years, months, weeks to days, hours, minutes and even seconds.