Hi, If I were to script the whole thing by splitting the time string into its component parts..I am not that familiar with this. Can somebody help me through this? Here's another examle I wan't to do. Please see below: My time is in 24 hrs. setting. I just want to deduct the time 05:22 a.m. to 11:23 a.m. to get the hr. difference. Thanks 05:22.I 11:23.O total hrs. rendered: ??? 12:00.I 15:59.O total hrs. rendered: ???

If your times are in 24hr format, don't put 'a.m.' after them! Assuming the '.I' and '.O' are not part of your time strings: dm=$((${t2#*:}+60*${t2%:*}-${t1#*:}-60*${t1%:*})) sets 'dm' to the (possibly -ive) difference in minutes between t2 (latest) and t1 (earliest) if ((dm < 0)) then dm=$((dm+24*60)); fi; compensates for any pair of times spanning the boundary of a day. print "$((dm/60))h $((dm%60))m" gives the elapsed time eg. '2h 24m'.