#### function udf with date and time

```Hi,

How can I program a udf function that counts the hours between two
times knowing that they can occur on the same day or in several days.
Example:

Start 1/1/2009 10:30
End  1/2/2009 9:30

The function should calculate 23 hours, also minutes

Thanks guys
```
 0
1234
12/17/2009 12:13:56 AM
excel 39879 articles. 2 followers.

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```> How can I program a udf function that counts the hours between two
> times knowing that they can occur on the same day or in several days.

See Chip's page for examples:
http://www.cpearson.com/excel/DateTimeWS.htm
```
 0
Kevin
12/17/2009 12:45:14 AM
```Do you really need a UDF for that? If the start date and time is in A1
and B1 and the end date and time in A2 and B2, then the following will
give you the elapsed (decimal) hours:

=3D(A2-A1+B1-B2)*24

Format the cell as number with 2dp. Note that an answer of 16.25, for
example, will mean 16 hours and 15 minutes.

Hope this helps.

Pete

On Dec 17, 12:13=A0am, 1234 <altachicasauda...@gmail.com> wrote:
> Hi,
>
> How can I program a udf function that counts the hours between two
> times knowing that they can occur on the same day or in several days.
> Example:
>
> Start 1/1/2009 10:30
> End =A01/2/2009 9:30
>
> The function should calculate 23 hours, also minutes
>
> Thanks guys

```
 0
Pete_UK
12/17/2009 2:28:37 AM
```Sorry, I can see that I have got that a bit mixed up. It should be
this:

=3D(A2-A1+B2-B1)*24

Hope this helps.

Pete

On Dec 17, 2:28=A0am, Pete_UK <pashu...@auditel.net> wrote:
> Do you really need a UDF for that? If the start date and time is in A1
> and B1 and the end date and time in A2 and B2, then the following will
> give you the elapsed (decimal) hours:
>
> =3D(A2-A1+B1-B2)*24
>
> Format the cell as number with 2dp. Note that an answer of 16.25, for
> example, will mean 16 hours and 15 minutes.
>
> Hope this helps.
>
> Pete
>
> On Dec 17, 12:13=A0am, 1234 <altachicasauda...@gmail.com> wrote:
>
>
>
> > Hi,
>
> > How can I program a udf function that counts the hours between two
> > times knowing that they can occur on the same day or in several days.
> > Example:
>
> > Start 1/1/2009 10:30
> > End =A01/2/2009 9:30
>
> > The function should calculate 23 hours, also minutes
>
> > Thanks guys- Hide quoted text -
>
> - Show quoted text -

```
 0
Pete_UK
12/17/2009 9:21:48 AM
```Hi,

Yes., I need and UDF function but thank you very much for your
```
 0
1234
12/17/2009 12:38:07 PM
```You're welcome.

Pete

On Dec 17, 12:38=A0pm, 1234 <altachicasauda...@gmail.com> wrote:
> Hi,
>
> Yes., I need and UDF function but thank you very much for your

```
 0
Pete_UK
12/17/2009 12:42:45 PM

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