I have a list of times in one column formatted as hh:mm:ss. Some of the
cells are blank because there was no time associated with a particular task.

I'm trying to sum and ultimately average these numbers. Everytime I try I
get 00:00:00. I've tried formatting both the column and my calculation to
[hh]:mm:ss and that doesn't appear to work. The only thing that works is
adding each value individually. I can't do that as there are thousands in my
list. Little help?

Jaime,

This is indicative of the times having been entered as strings.

Toi fix this, put a 0 into a blank cell that is formatted for time (it should show 0:00:00 or
similar), copy it, select your cells with the 'times' , right-click your selection , select Paste
special..., select 'All' under paste and 'Add' under operation. Then click OK.

Then your SUM and AVERAGE formulas will work.

HTH,
Bernie
MS Excel MVP


"Jaime" wrote in message
...
I have a list of times in one column formatted as hh:mm:ss. Some of the
cells are blank because there was no time associated with a particular task.

I'm trying to sum and ultimately average these numbers. Everytime I try I
get 00:00:00. I've tried formatting both the column and my calculation to
[hh]:mm:ss and that doesn't appear to work. The only thing that works is
adding each value individually. I can't do that as there are thousands in my
list. Little help?