David H Ringstrom

After expressing disappointment following his first encounter

David H Ringstrom explores some of the quirks of the most popular Excel function: SUM. 

Most Excel users use the SUM function to sum a single range, such as =SUM(B2:B8).


The latest tip from David Ringstrom was inspired by a question in one of his High Impact Excel webinars.

AccountingWEB.com’s US tech editor-at-large David H Ringstrom has a few reservations about Microsoft’s spreadsheet migration to its big rival’s phone and tablet op


David Ringstrom says that building complex spreadsheets without using VLOOKUP is like putting a screw in the wall with a hammer.

Transatlantic trainer David H Ringstrom shows how to expand your formatting repertoire from cell colours and shades to include number formats.


David H Ringstrom returns to the scene of one of his more popular posts to pick out the second and successive instances of duplicate values in an Excel list.

AccountingWEB’s trans-Atlantic Excel trainer David H Ringstrom continues his series with a look at techniques to improve the integrity of the AutoSum function.


David H Ringstrom continues his series of productivity suggestions with a tutorial explaining how to make Excel’s data validation facility work even more smoothly.