=A1+1/24 if you want the result in a separate column.
If you want the result in the original column, put =1/24 in a spare cell,
select and copy it, then select your column of numbers, paste special/ add
--
David Biddulph

"Sarah P" <Sarah wrote in message
...
Hi, I have a column of time already set up but need to add an hour to that
column now. How do I do that without changing every cell? I have set the
time in custom as I need it to just show hh:mm
Help!
Thanks Sarah