Subracting Time.

[GEM]

How do I subtract time?? For example

A1=20:00 HRS
B1=15:00 HRS
C1=(A1-B1)-1

I want to always subtract 1:00 hour from the result. , =(A1-B1)-1 I get,
######
How can I get 4:00 as the answer??

 

[Pete_UK]

Time is stored internally by Excel as fractions of a 24-hour day, so
do this:

=A1-B1-1/24

Hope this helps.

Pete

 

[Shane Devenshire]

The question is how are the times entered - are the enter as 15:00 meaning 15
hours or 3 PM?

If you subtract 20 from 15 you get a negative number and then you subtract
another 1, more negative. If the cell where the formula is is formatted to
time you will get #####. Excel does not handle times as negative.

 

[Shane Devenshire]

My appologies for the last email I read B1-A1.

In your case the problem is the -1. 1 represents an entire day. whereas 1
hour should be entered as =1/24

My comments about Excel handling negative numbers are still correct.

 

[Dave Peterson]

One more:

=a1-b1-time(1,0,0)

How do I subtract time?? For example

A1=20:00 HRS
B1=15:00 HRS
C1=(A1-B1)-1

I want to always subtract 1:00 hour from the result. , =(A1-B1)-1 I get,
######
How can I get 4:00 as the answer??

 

[Dave Peterson]

Except when the workbook uses the 1904 date system.

 

[GEM]

Perfect, it worked!! Thanks!!!

My appologies for the last email I read B1-A1.

In your case the problem is the -1. 1 represents an entire day. whereas 1
hour should be entered as =1/24

My comments about Excel handling negative numbers are still correct.

--
If this helps, please click the Yes button

Cheers,
Shane Devenshire