SUM is the spreadsheet equivalent of an open invite: it welcomes everything into the total, whether it belongs there or not.

Microsoft's spreadsheet program can do way more than you might realize. These are the hacks and tricks you need to know.

Excel considers dates and times as numbers in cells, making calculation difficult. Excel processes 6 AM as "0.25," because it is one quarter of the way through the day. If you need to add a number of ...

Conditional formatting tricks: Sum values in Excel by cell color Your email has been sent When you think VBA code is your only hope, try combing built-it conditional formatting tools. You might just ...

When you type a seven-or-ten-digit phone number into an Excel cell that uses the phone number format, Excel will automatically change the way the number looks so that it appears as a phone number. If ...