Hi Aaron
This works for numbers : =LEFT(A1,3)&-MID(A1,5,3)&-RIGHT(A1,3)
This one works for text and numbers, but your numbers are changed to text.
=LEFT(A2,3)&"-"&MID(A2,5,3)&"-"&RIGHT(A2,3)
HTH
John

"Aaron H" <Aaron wrote in message
...
Hi guys, is there a way to convert the following
123456789 to 123-456-789
or
abcdefghi to abc-def-ghi
I need to convert a long list of serial numbers so I can look for them, but
doing it one by one will take me an eternity.

Thanks