:42:01
:02:58
:04:45
:25:13

are all Text not times try using this formula in a newly inserted column:

=("0:"&(SUBSTITUTE(J1,":","",1)))+0

then copy and paste the column back as Paste Special values and reformat
the column as time then delete the original column.

--
HTH

Sandy
In Perth, the ancient capital of Scotland
and the crowning place of kings


Replace @mailinator.com with @tiscali.co.uk


"Donald B" wrote in message
...
I have tons of times in this format:
:42:01
:02:58
:04:45
:25:13

and need to change to:

0:42:01
0:02:58
0:04:45
0:25:13

Pls help...
tia
Donald