Ignoring Blank Cells when Performing Calculations

While performing the calculation to ignore the blank cells we will use ISNUMBER, AND and IF formulas in Microsoft Excel. 

ISNUMBER: This function can be used to check if a cell contains a number.


For Example:-

  • Cell A2 contains the number 123
  •  =ISNUMBER (A2), function will return “TRUE”
  • Cell A3 contains the text “XYZ”
  • =ISNUMBER (A3), function will return “FALSE”


IF: -IF condition allows us to use multiple conditions in a cell. It helps us to make the function flexible and Excel allows upto a max of 64 conditions which can be checked in a cell.

if function

Example:Cells A2 and A3 contain the numbers 3 and 5. If the cell contains 3, then the formula should display “Yes” otherwise “No”.

                        =IF (A1=3,”Yes”,”No”)



AND: This function is an operator function and is used to combine multiple criteria for a cell

and function

Example:Column A contains 3 numbers. We need to check if these numbers are greater than 10 and less than or equal to 50.



2 of the cells have numbers which are not greater than 10 AND less than or equal to 50. Hence they show as False, while the last number has a True result.


Let’s take an example and understand how you can ignore blank cells when performing calculations.

We have 2 lists in columns A & B, in which some cells are containing numbers and some cells are blank. In this example we need to multiply the numbers from the corresponding cells in both the columns. Our condition is that if any cell among the two is blank, the formula should give a blank result, else it should multiply the numbers in both the cells.


  • Select the cell C2.
  • Enter the formula =IF(AND(ISNUMBER(A2), ISNUMBER(B2)),A2*B2,” “)
  • Press enter on the keyboard.
  • The function will return 3 in cell C2, as both the cells contain numbers.
  • Copy the formula by pressing the key “CTRL+C” and paste it in the range C3:C6 by pressing the key “CTRL+V” on the keyboard.


We find that once the formula has been copied to the whole column, only cells C2 and C5 show the result, while C3, C4 and C6 are blank as any of the cells in these rows are blank.

In this way you can use this formula to ignore the blank cells while the calculation is performed.


 image 48

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Users are saying about us...

  1. I have a formula to calculate time as follows, where C9 is 8:00am and D9 is 6:00PM:


    This returns a value of 10.

    I want to edit the formula to return a blank cell if C9 and D9 were empty.

    Help me!!??

  2. My current formula is to compare goals scored in a football game. =IF(M3=P3,1,0) is the formula I’m using to calculate a draw, how do I change this to produce a blank result if either/both M3 & P3 are blank?

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