Excel – Check if item exists in another column

The other day I had to create a “diff” between two lists in excel. More exactly, I had to verify which emails were missing between two lists of emails.


I could find two solutions to this problem, which are listed below. For both, I’ll assume that columns A and B contain the two lists and the formula is placed in column C.

Nice way

A more dedicated way is to take the element in B and check it against column A via a lookup. A formula like:

will give “OK” if there’s a match.

This solution does not require that lists are ordered.

Quicker solution

An alternative solution is with a dedicated MATCH() function:

This will give the row number if there’s a match and a N/A if there isn’t.

This solution needs the columns to be ordered.


A little experiment: If you find this post and ad below useful, please check the ad out :-)

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Scroll to top