Mac: The "Sum" function in spreadsheets is great, but if you're not the type to do all your list-making in Excel, coder Brett Terpstra built an OS X System Service that allows you to total up any ...

This tutorial will show you how to create a Formula to Add, Subtract, Multiply or Divide in Microsoft Excel. You can do basic calculations easily!

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

You can sum cells across multiple sheets in Excel. This article presents steps for Adding single-cell values or Adding values in the range of cells.

You can use the Sum function in Microsoft Office Excel to sum columns of data, whether your data is in an Excel table or is simply a range in a column of your worksheet.

Inserting a blank row between existing rows of data in an Excel spreadsheet can be a tedious task if you insert each row individually. Fortunately, if you know this trick, inserting rows between ...