I don't know a format that will do it but you could put the number in 1
column and then have a formulae in the next column:
=VALUE("0.000"&CellRef) Replace CellRef with the cell address you have the
number in
The Value function makes sure it is stored as a number not as Text. HTH
Sheila

"Heidi" wrote:

I need to enter a lot of numbers that look like "0.000124". There are always
3 leading zeros after the decimal.

I'd LIKE to just ENTER "124" and have excel convert it to the "real" number
automatically (sort of like if you enter 40 in a % formatted column, it
automatically converts it to 0.40).

Do I have to use a formula, or is there a custom format that would work?
Thanks!