Excel will calculate the number of days between the dates entered in cells B3 and A3 and display the result in cell C3. Take your mouse pointer to the lower-right corner of cell C3. It will turn ...

Being able to subtract a date from today is a great way to accurately calculate the number of days between dates. Read: How to stop Excel from rounding numbers. What does the ABS function in Excel do?

It’s easy to find the number of days between two dates in Excel. You just subtract the earlier date from the later one. If you put July 19 in A1, May 5 in A2, and enter =a1-a2 in A3, you’ll ...

To calculate someone's age in Excel, enter the formula =DATEDIF(A2,TODAY()," y"), where cell A2 contains the date they were born and "Today" is today's date. Press Enter, and Excel will output the ...

To ensure that Excel converts your date to a number enter it like this, without quotes: "4/4/2011". Then click on cell "A2" and enter the later of the two dates in the same manner.

A TechRepublic member wrote for advice on calculating the years, months, and days elapsed between two dates. This tutorial explains the solution provided by TechRepublic contributor Jeff Davis.

DATEDIF(), which means Date + Dif, is a compatibility function left over from Lotus 1-2-3 that Microsoft adopted in Excel version 2000. It's fallen off current Excel menus, but you can still use it.