Have you ever been working with a large Excel or other spreadsheet document and think, "man, I wish I could look up what the number equivalent of column BD is!"? Me too!
So I built a crazy simple web app that converts an Excel column letter (or letters) to its numerical value. For example, BD = column #56. I frequently use this for figuring out the column number when doing a VLOOKUP. Or when I'm working on very wide spreadsheets.
You can find the free Excel Column Letter To Number tool at: http://www.excelcolumnlettertonumber.com/
Enjoy and let me know what you think.