Switching Parts of a String in Excel

I had the need to fix mistakenly entered email addresses in an Excel, and luckily the mistake was a recognizable pattern. They should have been firstname.lastname@domain.com but were entered as lastname.firstname@domain.com. This short post explains how I extracted the names and switched them.

How to Swap Parts of an Excel String

First assume you have **smith**.joe@acme.com in cell A2, and that what you want is joe.**smith**@acme.com in cell A5. Enter this formula in cell A3:

=LEFT(A2,(FIND(".",A2,1)-1))

That extracts “smith” out of the email address in A2, by using the FIND function to return the number of the position of the period. You subtract 1 to tell LEFT when to stop extracting.

Next, in cell A4, enter this formula:

=MID(A2,(FIND(".",A2,1)+1),((FIND("@",A2,1))-(FIND(".",A2,1)+1)))

That uses MID to extract from one after the period, through one behind the @. This is about finding the positions of parts of the string you can see are in a pattern, and subtracting or adding 1. Now in A5 you can concatenate the two in the proper order, and add the domain, thusly:

=A4&"."&A3&"@acme.com"

That’s it & good luck!