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# Start Date 1 and Finish Date 1

## Start Date 1 and Finish Date 1

(OP)
Project 2010
Created custom Start Date 1 and Finish Date 1 -- how do I calculate the duration in whole days?

It seems that for Duration : if I subtract Finish Date 1 from Start Date , I get a decimal number.

I'm sure it's simple and I'm way over thinking it.
Thanks
Laurie

### RE: Start Date 1 and Finish Date 1

You do realize that Date/Time is a decimal number.

Just take the integer of the duration to get a whole number, if you don'e care.

Just remember that the duration = Start - End + 1

Skip,

Just traded in my OLD subtlety...
for a NUance!

### RE: Start Date 1 and Finish Date 1

You can create a Custom Field, say Duration1, with a formula to calculate the difference between Start Date 1 and Finish Date 1.

Is there a reason you're not using the built-in Start and End dates (and duration) at the task and summary levels?

==================================
The trouble with doing something right the first time is that nobody appreciates how difficult it was - Steven Wright

### RE: Start Date 1 and Finish Date 1

(OP)
Good question Johnherman. I have a client that is implementing 11 sites; they would like to see the dates for each site side by side in a project plan.

### RE: Start Date 1 and Finish Date 1

Insert a spar duration field (Duration1 for example). Right click on the field and select "Customize field". click the formula button. Enter the formula:

ProjDateDiff([Start1],[Finish1])

I hope this helps.

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