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I`m a Microsoft Excel MVP (Most Valuable Professional) and have been since the inception of the program in 1995. I can answer every kind of Excel question except: API, Importing/exporting to other programs (powerpoint, word,...) Also check out my in-person training link at http://www.thumbtack.com/ny/new-york/excel-training/

Experience in the area

Worked with MS Excel since version 0.99 (on the Mac!). Was contributing editor to Excellence Magazine, having written >300 articles. John Walkenbach said of me "I finally met someone who knows as much about Excel as I do."


Excellence, The Expert, Microsoft


BA in math, Hofstra University, 1965

Awards and Honors

Led sessions for the Convergence 2004-2006 seminar on Excel tips & tricks

What do you still hope to achieve/learn in this field?


Something interesting about this subject that others may not know:

See my book, This isn't Excel, it's Magic! at http://www.iil.com/iil/excelmagic

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
Elaine01/18/17101010Thanks very much!
Elaine01/17/17101010Quick response and very helpful!
Joe01/09/17101010You nailed, as always! Thank you!

Recent Answers from Bob Umlas

2017-01-10 Print Preview Problem:

It seems that sheet is corrupted somehow. If the page can be seen in one screenshot, press the Print Screen button, paste the result to a new page and print that new page. Feel free to send me the wb with

2017-01-04 Add weekly data starting on first friday of a month:

Assuming I understand you:  Enter this formula via ctrl+shift+enter: =MATCH(6,WEEKDAY(A:A),0). Say that's in F2. In G2 enter the # of weeks you want to sum up.  The sum formulas are then these:  Add up

2017-01-04 Macro:

Sorry, now I'm confused. You said A1 contains values from1-10 but your example includes 11,16,21,26. You said A2 contains values from 100-121 and your example contradicts that and said 1-126. I need to

2017-01-04 Macro:

Sub Answer()      Range("A1").Value = Int(Rnd * 10) + 1      Range("A2").Value = Int(Rnd * 22) + 100      Range("B1").Formula = "=MIN(A1:A2)"  End Sub    But note that since A1 will contain values from

2016-11-15 structured references in Data validation list specification:

Define a name, say List, which is equal to the column you want in the table. If the title is Part Number, then the List can be defined as   =Table1[[#All],[Part Number]]    (This assumes the name of the


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This topic answers questions related to Microsoft Excel spreadsheet (or workbook) stand-alone or Mircrosoft Office Excel including Excel 2003, Excel 2007, Office 2000, and Office XP. You can get Excel help on Excel formulas(or functions), Excell macros, charting in Excel, advanced features, and the general use of Excel. This does not provide a general Excel tutorial nor the basics of using a spreadsheet. It provides specific answers to using Microsoft Excel only. If you do not see your Excel question answered in this area then please ask an Excel question here


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