I have a established a custom list with 5 columns for testing.

  1. Title column
  2. Date columns (Date1 & Date2)
  3. Calculated column to count days between the 2 dates (Total)
  4. Calculated column to count how long it was since the first date column was entered (How Long).

What I am trying to accomplish is that when the "Date2" column is filled the "How Long" column will blank out.


enter image description here

So in this case because there is a date in the "Date2" column I want the "How Long" column to be blank. The current formula for my "How Long" column is simple: =Date1-TEXT(NOW(),"mm/dd/yyyy").

Is it possible to add additional syntax that will blank the "How Long" out when a date is entered into "Date2"?

3 Answers 3


You can use the ISBLANK Syntax, as Matiur Rahman provided.

But the formula should be:


enter image description here

  • This worked perfectly. Thank you!
    – Chris
    Oct 7, 2020 at 13:52

Try this:


enter image description here


In order to check if the date column is blank or not, you can use ISBLANK function in your formula.


=IF(ISBLANK([Date Column]), "Date column is blank", "Date column is filled")

So, in your case you need to update your formula like below:

=IF(ISBLANK([Date2]), [Date1]-TEXT(NOW(),"mm/dd/yyyy"), "")

Reference: IS functions - Check for ISBLANK example

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.