"Matt" wrote in message ...
is there a way i can show negative time eg needs to work 3:00 hours but only
works 2:00 hours it will come up as -1:00hours but if then they do an extra
2:00 hours it will show 1:00

Hi Matt.
The [h] formatting can show negative hours.
But you can not have negative minutes shown also.
Try this user formatting
[h]:mm;-[h]:--
It will show 3:00 for the positives, and -1:-- for the negatives.
When only the format is fiddled with, the underlying numbers don't change,
and can be used in further calculations.
Hans T.