Excel offers several easy ways to calculate expiry dates based on days, months, or business rules. In this post, we’ll explore different ways to automate expiry date calculations in Excel.

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.

Percentages aren't always easy to calculate, but one of the best tools in Excel's toolbox is calculating percentages for you. Here's how to do it.

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.

Learn how to calculate Weighted Average in Excel with percentages using the SUM function and the SUMPRODUCT function.