Last issue, I wrote about an Ajax-enabled Web application that has the potential to oust, or at least augment, Outlook. This issue, I have another Ajax Web application that hints at what could be done ...

Way back in December, I wrote about Num Sum, a Web-based spreadsheet. Since then, Num Sum has matured and added quite a few features, including the ability to work on Num Sum spreadsheets offline, ...

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 set ...

To sum and subtract in Google Sheets, use the formula =SUM(x:y) or =MINUS(x,y) in the desired cells and input the relevant values. Press Enter to get the results. Adding up columns or rows of numbers ...

Have you ever thought of the humble SUM function as a secret weapon for advanced analytics? Most Excel users see it as a basic tool for adding numbers, but what if I told you it could do so much more?

Understanding how cells behave in relation to one another is essential to getting the most out of Microsoft Excel. When you're working with multiple worksheets simultaneously, it can become tedious to ...

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 ...

These four overlooked Excel features completely changed how I design spreadsheets.

AGGREGATE was built to handle messy data from the start.

With spreadsheets, you store and analyze sets of data, which is key in many businesses. Spreadsheets offer a range of automated functions to perform calculations on data in addition to building graphs ...