Thanks Duke very much. I looked back and wrote a formula to "peel" off the
last 0 in the hhh and made it hh and excel liked that so the numbers
calculated properly.

"Duke Carey" wrote:

see if the info here helps you

http://cpearson.com/excel/datearith.htm

"tri_p" wrote:

I have a column of numbers in hhh:mm:ss and need to sum them per group,
when I try to add them its ugly the only way I've been able to do it
correctly is pull the number out and copy them to a seperate column ie: hours
mins secs then add them independantly then use the 24*60*60 to get them to
come out right.

question
1. is there an easier way to add these without trying to pull them out (the
format on the cells are custom and hhh:mm:ss).
2. If I have to copy them over into seperate columns what is the best way to
do it (automatically).

As most of you know I'm not the code master so go easy on me please.

Thanks for all help,

ScottP