What is the formula for age in Excel?

Answer 1

Put the date of birth into a cell., say cell B2 Then put the following formula into another cell.

=INT((TODAY()-B2)/365.25)

First it takes the date of birth from today's date. That gives a number of days. To take account of leap years, that total is then divided by 365.25 to convert it into years. As we generally think of your age as being what you were at your last birthday, we use the INT function to get the whole number part of your age.

Answer 2

Take today's date and subtract your date of birth from it. So say you put your date of birth in cell A2, then in another cell you could put the following formula:

=TODAY()-A2

Initially, you will get a date. Interestingly, if you look at the last two digits of that date, it will be your age in years. Then format the cell to number and you will see the amount of days since you were born.