Consider using the unicode symbol for KM2:

㎢

It is U+33A2 (13218 decimal)
--
Gary''s Student - gsnu200908


"Emece" wrote:

I want to do a custom format that includes Km2, with the 2 as a superscript.
First I write it down in a cell and set the 2 to be a superscript. Eventhough
in the cell I see it correctly, in the formula bar I don't see the 2 as a
superscript. So when I select it and paste it in the custom format, the
number is displayed normally and not in the way I want. Why does this happen?

Thanks in advance

Regards,
Emece.-