Happily, Revit 2012 provides us with three extra functions we can use in formulas: ROUND(x), ROUNDUP(x), and ROUNDDOWN(x).
The solution? Create a new Calculated Parameter that does the rounding for you, and then total this column.
Here is a Wikihelp tutorial on the subject:
Round Function in Formulas
And here is a quote from the page that originally inspired this post:
Revit 2012 version introduces three new functions for rounding formulas.
We will use the Round (x) which allows rounding to the nearest whole (The principle is the same with Roundup () and ROUNDDOWN ())
In French http://revitez.blogspot.com/2011/07/revit-2012-arrondir-les-surfaces-dans.html
|Image from Revitez! blog|