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With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He is president of Sharon Parq Associates, a computer and publishing services company.

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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),

There are times when it is helpful to know if a cell contains something—it doesn't really matter what it contains, just so it contains something. In these instances there are two ways you can approach the problem.

The first solution is to simply use the LEN function to determine if there is a length to what is contained in a cell. For instance, let's say you wanted to check if there was a value in cell F1. You could use the following:

=IF(LEN(F1)>0,"Found something there","Nothing is there")

If there is nothing in cell F1, then the length will be equal to zero. If there is something in the cell, even a number, then the length will be greater than zero.

The second solution is a variation on the LEN approach. All you need to do is check to see if there is anything in the cell. This may sound odd, but it is easier when you see the formula. For example, the following will check to see if there is anything in cell B4:

=IF(B4<>"","Found something there","Nothing is there")

The test in this formula is True if there is anything in the cell. If the cell is empty, then the test fails.

Another solution you can use is the ISBLANK worksheet function. This function returns True if the target cell is blank, and False if it contains anything.

As an example, let's suppose you want to check if the user has entered something in cell D7. You can use the following to make the determination:

=IF(ISBLANK(D7),"Input values missing",D7)

In this case the cell containing this formula would contain the same value as in D7, provided something was there. If there is nothing in D7, then the cell contains the text "Input values missing."

*ExcelTips* is your source for cost-effective Microsoft Excel training. This tip (2112) 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: Checking for an Entry in a Cell.

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I need to auto print a separate filtered worksheet of each debtor per month .... I need excel to skip to next one if there is no charge for a debtor that month. So say c3 has no info then skip to next debtor and loop till last debtor has been printed.

i want to require that if cell A1 is filled, cell B1 is also filled, and give an error message to user saying that you cannot leave Cell B1 blank. is there a formula for this or any macros ?

Thank you very much for these tips. My excel spread sheet formula is using two cells in two different columns, I found the solution right here.

=IF(ISBLANK(C17)," ",C17-C16)

=IF(ISBLANK(C17)," ",C17-C16)

Thanks the tips works like a dream

Sure, except that the LEN and ISBLANK and all the other logical test throw a "Formula refers to empty cell" error if the cell they refer to is actually blank. What good are blank-checking "functions" that can't handle blank cells?

This is great, I'm doing my inventory and keep on receiving error because of missing values..28,000 for inventory is a lot and these options you have to check the data entries really help!

To Jones Lee: Of course "ISBLANK" fails for B1, that cell contains a formula, so it is not blank. You need to be checking A1 in your example (the 'input' cell).

Thanks for this. However I encounter a problem of "ISBLANK". Say I put this formula in cell B1 =if(len(a1)=0,"","a1") and leave cell A1 blank. Of course cell B1 shows blank, but formula ISBLANK(B1) still feeds back FALSE.

Thank you for this one! I created a rough file for doing my tax returns. (I find confusing the bells and whistles and unnecessary lines of the commercial tax programs.) However, sometimes I might forget to fill in a cell, and wrongly think that empty cell's content is included into a calculation. From now on I'll incorporate this additional check to make sure there are no stupid mistakes.