if A1 = 02:30 and B1 = 07:00
then you can use:
=MOD(A1-B1+"24:00","24:00")
to get 19:30

"Amnon Wilensky" wrote in message
...
Hi,

I want to convert Israel time to U.S time. Every thing is going fine until
the number become negative. For example: if the time in Israel is 02:30
and I want to find what is the time at New York I have to subtract 7:00
hours, and I Excel don't calculate it.

Any help?

Thanks,

Amnon