#### Overview of this book

Excel is a popular program. Millions of people throughout the world use it on a regular basis. But it’s a safe bet that the vast majority of users have yet to discover some of the amazing things this product can do. 101 Excel 2013 Tips, Tricks, & Timesavers?is packed with information that you need to know in order to confidently and seamlessly master the challenges that come with using Excel! Excel 2013 is excellent, but there's lots to learn to truly excel at Excel! In this latest addition to his popular Mr. Spreadsheet's Bookshelf series, John Walkenbach, aka "Mr. Spreadsheet," shares new and exciting ways to accomplish and master all of your spreadsheet tasks. From taming the Ribbon bar to testing and tables, creating custom functions, and overcoming "impossible" charts, mixing nesting limits, and more,?101 Excel 2013 Tips, Tricks, & Timesavers?will save you time and help you avoid common spreadsheet stumbling blocks.
Table of Contents (10 chapters)

Tip 38: Calculating a Person’s Age

Calculating a person’s age is a bit tricky because the calculation depends on not only the current year but also the current day. And then you have to consider the complications resulting from leap years.

In this tip, I present three methods to calculate a person’s age. These formulas assume that cell B1 contains the date of birth (for example, 2/16/1952) and that cell B2 contains the current date (calculated with the TODAY function).

Method 1

The following formula subtracts the date of birth from the current date and divides by 365.25. The INT function then eliminates the decimal part of the result:

`=INT((B2-B1)/365.25)`

This formula isn’t 100 percent accurate because it divides by the average number of days in a year. For example, consider a child who is exactly one year old. This formula returns 0, not 1.

Method 2

A more accurate way to calculate age uses the YEARFRAC function:

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