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** Please Note:** This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later),

If you have a formula in a worksheet, and the cell referenced by the formula is blank, then the formula still returns a zero value. For instance, if you have the formula =A3, then the formula returns the contents of cell A3, unless cell A3 is blank. In that case, the formula returns a value of zero.

This seems to be related to the idea that it is impossible for a formula to return a blank value, when "blank" is used synonymously with "empty." You can, however, expand your formula a bit so that it returns an empty string. Instead of using =A3 as your formula, you would use the following:

=IF(ISBLANK(A3),"",A3)

This formula uses ISBLANK, which returns either True or False, depending on whether the referenced cell (A3) is blank or not. The IF function then returns an empty string ("") if A3 is blank, or it uses the value in A3 if A3 is not blank.

Regardless of what the formula returns, you can still use its result in other formulas, and it will work fine. Even if it returns an empty string, it is still treated by other formulas as if it contained zero. In areas where treating the cell as if it contained zero might be problematic (such as when you are charting the results of the formula), then you can modify the formula a bit, as shown here:

=IF(ISBLANK(A3),NA(),A3)

This formula returns the #N/A error if A3 is blank. This error propagates through other formulas that reference the formula, but the #N/A error is ignored completely when charting.

While the above solutions are satisfactory for most people, some people would really like to see a target cell be truly blank if the source cell is blank. For instance, you might want cell B7 to be blank if cell A3 is blank. If you put a formula in cell B7 (as already discussed), then cell B7 is not truly blank—it contains a formula.

If this is your goal—true "blankness"—then you can only achieve it through the use of a macro. The macro will need to check to see if the source cell was changed. If it was, then whatever is in the source needs to be copied to the target cell.

Private Sub Worksheet_Change(ByVal Target As Excel.Range) Dim rMonitor As Range Dim rTarget As Range Set rMonitor = Range("A3") Set rTarget = Range("B7") If Not Intersect(Target, rMonitor) Is Nothing Then rMonitor.Copy rTarget End If Set rMonitor = Nothing Set rTarget = Nothing End Sub

*ExcelTips* is your source for cost-effective Microsoft Excel training. This tip (2174) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Returning Zero When a Referenced Cell is Blank.

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Kris, I have a few comments:

First, when testing multiple cells for blank-ness, you might prefer to use the COUNT function, which returns the number of cells that are filled.

Second, not sure if you meant to do this or not, but you missed C46 in your ISBLANK tests. This could cause your MAX function to return zero when you expect it to return blank.

With these changes, your formula would become:

=IF(COUNT(C40,C43,C46,C49)=0,"",MAX(C40,C43,C46,C49))

Also, the reason your formula returns "1/0/1900" is because the cell is formatted as a date. If you change the number formatting to a number format or General, that result will change to a zero, which is how Excel (and every other SS program I've ever had to work with for that matter) treats a blank cell. If that formula is just a direct reference to C36, then C36 can't actually be blank, and C36 is probably picking up a blank from C46 and returning 0 (zero).

First, when testing multiple cells for blank-ness, you might prefer to use the COUNT function, which returns the number of cells that are filled.

Second, not sure if you meant to do this or not, but you missed C46 in your ISBLANK tests. This could cause your MAX function to return zero when you expect it to return blank.

With these changes, your formula would become:

=IF(COUNT(C40,C43,C46,C49)=0,"",MAX(C40,C43,C46,C49))

Also, the reason your formula returns "1/0/1900" is because the cell is formatted as a date. If you change the number formatting to a number format or General, that result will change to a zero, which is how Excel (and every other SS program I've ever had to work with for that matter) treats a blank cell. If that formula is just a direct reference to C36, then C36 can't actually be blank, and C36 is probably picking up a blank from C46 and returning 0 (zero).

thank you very much, this site is helpful

The NA() hint helped but what if I dont want it to return #na?. I have a formula in C36 as follows: =if(and(isblank(C40),isblank(c43),isblank(c49)),"",max(C40,C43,C46,C49)) which returns a blank cell. I later have a separate tab referencing C36 with the same formula referencing different cells that I want C36 included in but because the second formula treats C36 like it has a zero in it when in acutality is it blank the final formula returns the "1/0/1900" date instead of being blank. Obviously I am dealing with dates and these are details sheets compliling to an overview sheet. Hope you can help.

I had to use semicolons to get the formular to work.