Excel Formula Errors – Understand and Debug Them

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Excel formula error checklist and how to fix excel errorsImagine carefully creating a workbook with several calculations and formulas only see errors. What to do when you get an Excel formula error? Of course, you can shake your head and ask, “Why, why would you do that?”, but that will not help.

What to do when you have an Excel error like #NA or #REF

So in this article let’s learn how to fix Excel formula error. Those annoying #SOMETHING!s that you see when your excel formulas have something wrong with them.

Excel Formula Error Checklist

Use this checklist to quickly understand common formula errors, what they mean, when you would see them and how to fix them. Read on to know more about the errors.

ErrorWhat it means?Most common reasonHow to fix it?
#N/ANot ApplicableWhen VLLOKUP can't find what you wantMake sure your list has the value you are looking for. Use IFERROR or IFNA to fix
#DIV/0!Divide by ZeroDenominator is zeroUse IF formula to safe divide
#NAME?Could not find the nameSpelling mistake / typoDouble check your formula and fix the error
#########Could not display or formatCell too smallAdjust column width
#VALUE!Invalid valueConverting non-dates or numbersMake sure your dates are correctly formatted
#REF!Reference missingWhen you delete a row / column / cellCheck cell dependancies before deleting
#NUM!Invalid numberNumber too high or too lowCheck your calculation
#NULL!Missing or null valueReference points to nothingSee if your references are right

#N/A Formula Error

This is one of the most frequent excel formula error you see while using vlookup formula. The N/A error is shown when some data is missing, or inappropriate arguments are passed to the lookup functions (vlookup, hlookup etc.) of if the list is not sorted and you are trying to lookup using sort option. You can also generate a #N/A error by writing =NA() in a cell.

How to fix #N/A error?

Make sure you wrap the lookup functions with some error handling mechanism. For eg. if you are not sure the value you are looking is available, you can write something like =IFERROR(VLOOKUP(…), “Value not found”). This will print “value not found” whenever the vlookup returns any error (including #N/A)

Related: Learn more about IFERROR formula

#DIV/0! Formula Error

This is the easiest of all. When you divide something with 0, you see this error. For eg. a cell with the formula =23/0 would return in this error.

How to fix #DIV/0 error?

Simple, use IF formula to safe divide, like this:

=IF(A2=0, “”, A1/A2)

 

#NAME? Formula Error

The most common reason why you see this error is because you misspelled a formula or table or named range. For eg. if you write =summa(a1:a10) in a cell, it would return #NAME? error. There are few other reasons why this can happen. If you forget to close a text in double quotes or omit the range operator :. All these examples should return #NAME? error. =sum(range1, UNDEFIED_RANGE_NAME), =sum(a1a10)

How to fix #NAME? Error?

  • Make sure you have mentioned the correct formula name. Use auto-complete when typing formulas. This way, when you type formulas or use names / structural references, you will not make any mistakes.
  • Make sure you have defined all the tables and named ranges you are using in the formula.
  • Make sure any user defined functions you are using are properly installed.
  • Double check the ranges and string parameters in your formulas.

###### Error

You see a cell full of # symbols when the contents cannot fit in the cell. For eg. a long number like 2339432094394 entered in a small cell will show ####s. Also, you see the ###### when you format negative numbers as dates.

How to fix the ###### error?

Simple, adjust the column width. And if the error is due to negative dates, make them positive.

#VALUE! Excel Formula Error

Value error is shown when you use text parameters to a function that accepts numbers. For eg. the formula =SUM(“ab”,”cd”) returns #VALUE! error.

How to fix the #VALUE! error?

Make sure your formula parameters have correct data types. If you are using functions that work on numbers (like sum, sumproduct etc.) then the parameters should be numbers.

#REF!  Formula Error

This is one of the most common error messages you see when you fiddle with a worksheet full of formulas. You get #REF! Excel formula error when one of the formula parameters is pointing to an invalid range. This can happen because you deleted the cells. For eg. try to write a sum forumla like =SUM(A1:A10, B1:B10, C1:C10) and then delete the column C. Immediately the sum formula returns #REF! error.

How to fix the #REF! error?

First press ctrl+Z and undo the actions you have performed. And then rethink if there is a better way to write the formula or perform the action (deleting cells).

#NUM! Excel Error

This is number error that you see when your formula returns a value bigger than what excel can represent. You will also get this error if you are using iterative functions like IRR and the function cannot find any result. For eg. the formula =4389^7E+37 returns a #NUM! error.

How to fix #NUM! error?

Simple, make your numbers smaller or provide right starting values to your iterative formulas.

#NULL! Formula Error

This is rare error. When you use incorrect range operators often you get this error. For eg. the formula =SUM(D30:D32 C31:C33) returns a #NULL! error because there is no overlap between range 1 and range2.

How to fix the #NULL! error?

Make sure you have mentioned the ranges properly.

Formula not working – showing as text?

If you don’t see any error, but instead of seeing the result, all you see is your formula (like below), then check out Formulas not working page for information how to fix the problem.

excel formula showing as text - What to do when all you see is the formula, not result

Further Reading on Excel Formula Debugging

Formula Debugging using F9 Key

Learn to work with Circular References

Understand the difference between absolute and relative references

How to work with tables & structural references

Detect errors in your formulas [Office.com]

How to use new ERROR.TYPE formula to work with errors

Tell me how you debug formulas? What is the most common error you get?
What is the strangest and most confusing error you have seen? Please share in the comments so we can all have a laugh and find a way to fix the problem.

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40 Responses to “Looking up when the data won’t co-operate (case study)”

  1. Sumit Bansal says:

    Nice Trick.. Clever use of cell references

    Here is a formula I tried to create:
    =SUMPRODUCT(((NOT(ISERROR(SEARCH(L5,B4:H14))))*1),(B5:H15))

    It takes care of Caveat #1 (can handle text), but Caveat #2 remains.

  2. PeterB says:

    In situations like this, I will often use VBA to restructure the data (2 columns: dates and values) on to a new worksheet. I can then use this 'clean' source for data analysis (formula or pivot table).

    =SUMPRODUCT(((NOT(ISERROR(SEARCH(L5,B4:H14))))*1),(B5:H15)) and complex formulae in general are all very well but when you come back to them in a few weeks / months time, it is not at all easy to see what they do and what the limitations are.

  3. Somendra Misra says:

    Hi Chandoo,

    I had used this type of cell ref. various times while calculating average.
    But for the situation here try below formula . Note this is an array formula and must be confirmed with Ctrl+Shift+Enter.

    =SMALL(IF(MMULT((L5=B4:H14)*IF(ISNUMBER(B5:H15),B5:H15),{1;1;1;1;1;1;1}),MMULT((L5=B4:H14)*IF(ISNUMBER(B5:H15),B5:H15),{1;1;1;1;1;1;1})),1)

    Regards,

  4. Somendra Misra says:

    Hi, I think Using SEARCH in here will create a problem say there is a text like SUN and another text SUNLIGHT both result will be added by SUMPRODUCT.

    Regards,

  5. Elias says:

    Array option.

    =SUM(IF(MOD(ROW(B4:B14),2)=MOD(ROW(B4),2),IF(B4:H14=L5,B5:H15)))

    Regards

    • Michael (Micky) Avidan says:

      @Elias,
      Nice approach.
      Although not requested - the formula I suggested closes all possibilities.
      Criteria: _____ Value to retrieve:
      Date__________ Numeric
      Date__________Textual
      Textual________Numeric
      Textual________Textual
      While your formula copes with only the 3 first combinations.
      Michael (Micky) Avidan
      “Microsoft® Answer” – Wiki author & Forums Moderator
      “Microsoft®” MVP – Excel (2009-2015)
      ISRAEL

      • Elias says:

        @Michael,

        Sorry but I don’t understand your point. I believe the challenge was to return the summary of a given date. What is your really volatile formula doing that mine is not?

        Regards

        • Michael (Micky) Avidan says:

          @Elias,
          I didn't say that the challenge differs from what you just mentioned/aimed to nor that your formula doesn't provide the requested result.
          Please read my previous comment again and focus on the last combination (TEXT / TEXT).
          I, myself, always try to provide a global Formula that is capable to handle all sorts of data.
          Michael (Micky) Avidan
          “Microsoft® Answer” – Wiki author & Forums Moderator
          “Microsoft®” MVP – Excel (2009-2015)
          ISRAEL

          • Elias says:

            @Michael,
            I see your point, but you are missing the below points if you are trying to cover all sorts of data.

            What happened if the lookup value does not exist?

            Do you want the first, second, summary, concatenation of the values if the look value is repeated?

            See they are too many possibilities to be cover with just one formula.

            Regards

  6. Michael (Micky) Avidan says:

    1) The range: B4:H15 was named: RNG.
    2) The following Array Formula was "retrieved from my sleeve" and I hope it can be shorten.
    3) The formula seems to take care of BOTH(!) caveats.
    -------------------------------------------------------------------------------
    =OFFSET(INDIRECT(ADDRESS(SMALL(IF(RNG=L5,ROW(RNG),""),1),MOD(SMALL(IF(RNG=L5,(ROW(RNG))+COLUMN(RNG)/10),1),1)*10)),1,)
    -------------------------------------------------------------------------------
    Michael (Micky) Avidan
    “Microsoft® Answer” – Wiki author & Forums Moderator
    “Microsoft®” MVP – Excel (2009-2015)
    ISRAEL

    • Elias says:

      @Michael,

      Check what happened with your result if you type 41927 in D5.

      Regards

      • Michael (Micky) Avidan says:

        Correct. Didn't predict that.
        Will find time to work something out.
        Michael (Micky) Avidan
        “Microsoft® Answer” – Wiki author & Forums Moderator
        “Microsoft®” MVP – Excel (2009-2015)
        ISRAEL

      • Michael (Micky) Avidan says:

        @Elias,
        Let's hope the following Array Formula "closes all open doors".
        Again - it has nothing to do with your formula which works fine as long as the 3 first mentioned combinations are concerned.
        -------------------------------------------------------------------------------
        =INDEX(RNG,LARGE(IF(RNG=L5,MOD(ROW(RNG)-1,2)*(ROW(RNG)),""),1)-2,(MOD(SMALL(IF(RNG=L5,(ROW(RNG))+COLUMN(RNG)/10),1),1)*10)-1)
        -------------------------------------------------------------------------------
        Michael (Micky) Avidan
        “Microsoft® Answer” – Wiki author & Forums Moderator
        “Microsoft®” MVP – Excel (2009-2015)
        ISRAEL

        • Elias says:

          Ok, if you insist. The following will cover all the scenarios you listed. However, I’ll never recommend/use such of formula.

          Defined names:
          rDat = $B$4:$H$15
          rRow =ROW(rDat)-MIN(ROW(rDat))+1
          rCol =COLUMN(rDat)-MIN(COLUMN(rDat))+1
          rInc =MOD(rRow,2)=MOD(MIN(rRow),2)

          L6=INDEX(rDat,MAX(IF(rInc,IF(rDat=L5,rRow)))+1,MAX(IF(rInc,IF(rDat=L5,rCol))))
          Array Enter

          Regards

        • Frank says:

          @Michael,

          unfortunately, your array formula still seems to return wrong results (eg 3-Nov).

  7. Magda says:

    If data are organized like in the example, ie. looks like a calendar, the INDEX formula seems quite simple:
    =INDEX($B$4:$H$15,ROUNDDOWN((L5-B4)/7,0)*2+2,MOD((L5-B4),7)+1)

    • Marc says:

      Yours is effectively the same as what I just came up with, and I believe this is the optimal answer to this particular problem.

      My solution, before I saw yours:
      =OFFSET(B5,QUOTIENT(L5-B4,7)*2,MOD(L5-B4,7))

      OFFSET will work for an arbitrary list size, but INDEX might be easier to read.
      QUOTIENT does the round and division in a single step.

  8. XOR LX says:

    If there's an improvement over Elias's solution then I for one can't see it.

    Perhaps a non-CSE version which would also mean that only two references (B4:H14 and B5:H15), as opposed to three (B4, B4:B14 and and B5:H15), would require manually amending should the data range change, i.e.:

    =SUMPRODUCT((ISEVEN(ROW(B4:H14)-MIN(ROW(B4:H14)))*(B4:H14=L5)*B5:H15))

    I suppose we could make it a single, uniform range reference:

    =SUMPRODUCT((ISEVEN(ROW(B4:H14)-MIN(ROW(B4:H14)))*(B4:H14=L5)*OFFSET(B4:H14,1,,,)))

    which might be more appropriate should we e.g. wish to use a Defined Name for our range, i.e.:

    =SUMPRODUCT((ISEVEN(ROW(Rng)-MIN(ROW(Rng)))*(Rng=L5)*OFFSET(Rng,1,,,)))

    though whether that compensates for the extra, volatile function call is something to be debated.

    Regards

  9. Mahir says:

    I have tried something and then my Excel workbooks got shut down. Maybe that was too much?

    Anyway here is what I've tried:

    =SUMPRODUCT(INDEX(B5:H15;IF(ISEVEN(ROW(B5:H15));ROW(B5:B15)-ROW(B5)+1);{1\2\3\4\5\6\7}))

    Guess that was wrong? Would this approach work anyway?

    Looking forward to learn something from you Excel Experts.

  10. XOR LX says:

    @Michael Avidan

    As it stands that is not a very rigorous construction.

    You say "I, myself, always try to provide a global Formula that is capable to handle all sorts of data", which is a wonderful philosophy, but isn't it at least as important that we ensure that our formulas are independent of the row and column references of the data range in question, so that, should that range change, we do not have to re-work our solution?

    What happens with your formula, for example, if RNG is instead re-located one row down, from B4:H15 to B5:H16?

    When a formula is reliant upon the addition/subtraction of certain constants within the formula, which themselves are necessarily dependent upon the specific rows/columns in which the data lies at any given time (e.g. the -1 in MOD(ROW(RNG)-1,2)), then that formula is not a very flexible one.

    Hence the reason for my choice of a slightly longer construction:

    ROW(B4:H14)-MIN(ROW(B4:H14))

    which ensures that this part of the calculation is not dependent upon the precise location of the data range within the worksheet, and so will give correct answers even if that range is re-located.

    Regards

  11. Haz says:

    {=OFFSET(B4,MAX((B4:H15=L5)*ISODD(ROW(1:12))*ROW(1:12)),MAX((B4:H15=L5)*ISODD(ROW(1:12))*COLUMN(A:G))-1)}

    • Haz says:

      Non-array formula:
      =INDEX(B4:H15,SUMPRODUCT((B4:H15=L5)*(ROW(B4:H15)-ROW(B4)+1)*ISODD(ROW(B4:H15)-ROW(B4)+1))+1,SUMPRODUCT((B4:H15=L5)*(COLUMN(B4:H15)-COLUMN(B4)+1)*ISODD(ROW(B4:H15)-ROW(B4)+1)))

      Using one range (B4:H15), one reference (B4), one lookup value (L5) and no INDIRECT or OFFSET.

  12. MF says:

    My trial with defined names:

    DateRange
    =$B$4:$H$4,$B$6:$H$6,$B$8:$H$8,$B$10:$H$10,$B$12:$H$12,$B$14:$H$14

    Position
    =RANK('lookup problem'!$L$5,DateRange,1)

    L6
    =OFFSET(B4,ROUNDUP(Position/7,0)*2- 1,IF(MOD(Position,7)=0,6,MOD(Position,7)-1))

  13. Jeff Weir says:

    I'd probably just run with something like:
    =SUMPRODUCT((B4:H14=L5)*(MOD(ROW(B4:H14),2)=MOD(ROW(B4),2))*B5:H15)
    ...which is basically the same as Elias' but without the IFs

  14. Bermir says:

    The opposite of elegant but it works...

    =INDEX(B4:H15,IFERROR(MATCH(L5,B4:B14,0),0)+IFERROR(MATCH(L5,C4:C14,0),0)+IFERROR(MATCH(L5,D4:D14,0),0)+IFERROR(MATCH(L5,E4:E14,0),0)+IFERROR(MATCH(L5,F4:F14,0),0)+IFERROR(MATCH(L5,G4:G14,0),0)+IFERROR(MATCH(L5,H4:H14,0),0)+1,IFERROR(MATCH(L5,B4:H4,0),0)+IFERROR(MATCH(L5,B6:H6,0),0)+IFERROR(MATCH(L5,B8:H8,0),0)+IFERROR(MATCH(L5,B10:H10,0),0)+IFERROR(MATCH(L5,B12:H12,0),0)+IFERROR(MATCH(L5,B14:H14,0),0))

    • Bermir says:

      =INDEX(B4:H15,
      IFERROR(MATCH(L5,B4:B14,0),0)+
      IFERROR(MATCH(L5,C4:C14,0),0)+
      IFERROR(MATCH(L5,D4:D14,0),0)+
      IFERROR(MATCH(L5,E4:E14,0),0)+
      IFERROR(MATCH(L5,F4:F14,0),0)+
      IFERROR(MATCH(L5,G4:G14,0),0)+
      IFERROR(MATCH(L5,H4:H14,0),0)+1,
      IFERROR(MATCH(L5,B4:H4,0),0)+
      IFERROR(MATCH(L5,B6:H6,0),0)+
      IFERROR(MATCH(L5,B8:H8,0),0)+
      IFERROR(MATCH(L5,B10:H10,0),0)+
      IFERROR(MATCH(L5,B12:H12,0),0)+
      IFERROR(MATCH(L5,B14:H14,0),0))

  15. HF says:

    Named Range
    rownum = SUMPRODUCT(('lookup problem'!$B$4:$H$14='lookup problem'!$L$5)*ROW('lookup problem'!$B$4:$H$14)*ISEVEN(ROW('lookup problem'!$B$4:$H$14)))

    Formula
    =OFFSET($A$1,rownum,MATCH(L5,INDIRECT("$B"&rownum&":$H"&rownum),0))

  16. Venky says:

    How about SUM(IF(B4:H14=L5,B5:H15)) with array..it should work

  17. xen says:

    Sorry, Chandoo, you can't find stuff this way in every possible scenario.
    What if 2014-10-01 sales would equal 41.927 ? Which is serial number for 2014-10-15 ? SUMIF would fail to retrive correct answer. And your example data suggest that such number is possible in your table.

    It's better not to search through dates and numbers at the same time.

    If I'd solve a problem like this, it'd reformat table first so I get one column with dates and the other with numbers.

    In this case, formula to form date column would be:
    =INDIRECT(ADDRESS((INT((ROW()-4)/COUNT($B$4:$H$4))+1)*2+2;MOD(ROW()-4;COUNT($B$4:$H$4))+2;4;1))
    and numbers would be the same formula with sight adjustment (+3 instead of +2 at the end of first argument):
    =INDIRECT(ADDRESS((INT((ROW()-4)/COUNT($B$4:$H$4))+1)*2+3;MOD(ROW()-4;COUNT($B$4:$H$4))+2;4;1))

    And now you got two columns that you can safely use for searching!

  18. xen says:

    Oops, sorry, you actually mentioned that it doesn't work if number=date! I missed that part 🙁

  19. Vad says:

    ={OFFSET(A1,SUM((B4:H14=L5)*ROW((B4:H14))),SUM((B4:H14=L5)*COLUMN((B4:H14)))-1)}

    Works for all data... the solution I got for indirect looks little lengthy

  20. Rajesh says:

    I want to count last 20 records of a person, whose marks is greater than 2 and grade "manager". ....

    Assume A1 has got names (James, John...etc...)
    A2 "Manager"

    A3 "2"

    Someone please reply

  21. Rajesh says:

    I want to count last 20 records of a person, whose marks is greater than "2" and grade "Manager"

    Assume A1 "geroge" A2 "Michael" A3 "George" etc...name can found anywhere in the rows

    B1 "Manager" B2" clerk"

    C1 "2" C2, "4"

    please reply

  22. Marc says:

    Simplest I can come up with. No limitations for either 1 or 2. This does assume dates are an ordered list with 7 per row, and 2 rows per set. Assuming this is always true this will work for an arbitrary long list of dates.

    =OFFSET(B5,QUOTIENT($L$5-$B$4,7)*2,MOD($L$5-$B$4,7))

    • Michael (Micky) Avidan says:

      @Marc,
      Nice approach - however, as there are no "Negative Dates" - try:
      =OFFSET(B5,INT(L5-B4)/7)*2,MOD(L5-B4,7))
      ——————————————————————————-
      Michael (Micky) Avidan
      “Microsoft® Answer” – Wiki author & Forums Moderator
      “Microsoft®” MVP – Excel (2009-2015)
      ISRAEL

  23. Vijaykumar Shetye says:

    =OFFSET(B4,ROUNDUP((L5-41911+1)/7,0)*2-1,MOD(L5-41911,7))

    B4 has been used as reference cell for OFFSET().

    FOR ROWS:
    ROUNDUP(....,0) gives the integer value of a division. In case of presence of a remainder, ROUNDUP will add 1 to the Quotient.
    As opposed to ROUNDUP(), the INT() or QUOTIENT() functions eliminate the remainder.

    41911 = 01-Sept-2014, the first date in the data.

    *2 has been used because there are 2 columns per set of data.

    /7 has been used because there are 7 columns per set of data.

    For columns
    MOD(L5-41911,7))

    Vijaykumar Shetye,
    Panaji, Goa, India

  24. Awais says:

    This is how i did it

    {=INDEX(B4:H15, MAX((L5=B4:H15)*ROW(B4:H15))-2, MAX((L5=B4:H15)*COLUMN(B4:H15))-1 )}

  25. Paul says:

    Here's my solution:

    =INDEX(B4:H15,MATCH(1,MMULT(--(B4:H15=L5),TRANSPOSE(COLUMN(B4:H15)^0)),0)+1,MATCH(1,MMULT(TRANSPOSE(--(B4:H15=L5)),ROW(B4:H15)^0),0))

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