You can use

=SUM(firstst_sheet:last_sheet3!D1)

will sum D1 in all the sheets between 1st and last (both included)


Regards,

Peo Sjoblom

"master gardener" wrote:

I have a Excell workbook with several (20) worksheets. EAch worksheet
represents a person's work hours. I want to add values from each worksheet
(for instance total hours for each person during the year) on a separate
summary worksheet in the same workbook. Doing it manually (by using sum and
going to each worksheet) is timeconsuming since I have about 15 totals that I
need to calculate.