Formulas are powerful tools for performing calculations and analyzing data in Excel. In this beginner’s guide, you’ll learn how to use formulas and explore some popular built-in functions.

Launch Microsoft Excel and enter a date in an empty cell. Excel automatically recognizes common formats, such as "3/17/2012," "Mar 17, 2012" or "17 Mar 2012." Use the Month function to extract the ...

How many days? Excel doesn’t offer a function that returns the total number of days in a specified month, and before EOMONTH () came around, an expression to do so was complex.

Functions are the driving force of any Microsoft Excel spreadsheet, generating a single value or an array of results based on ...

Excel has over 475 formulas in its Functions Library, but we've selected the most popular, from date and time functions to mathematics and simple data manipulation.