if you may not separate these values try it with formula:

=MOD(MID(A1,FIND("- ",A1)+2,99)-LEFT(A1,FIND(" ",A1)-1),1)

The MOD function works with all times but especially with midnight

rollovers

mod 1 ... never used it. Thanks for the info
With a time entry of 11:00 - 1:00 I get .58. I wanted just 2 hours (12hr clock). I'll mess with it (maybe copied it wrong). But I'm on my way. Thank you again.