How can I have a calculation always round up to the nearest 10th when the number is any amount above the whole number? For example 4.01 -> 4.1 instead of going down to 4.0

For always rounding up to the next integer, you would use the Math.ceil() method.

Your code may work, but I strongly suggest to stay with complete syntax, as it makes your code more readable and understandable. It would then look like this:

var VOL = this.getField("VOL").value ;

var CFM50 = this.getField("CFM50").value ;

if (VOL == "" || VOL == 0 || CFM50 == "") {

event.value = 0 ;

} else {

event.value = Math.ceil(CFM50 * 60 / VOL) ;

}

Note that I also test for VOL to be 0, because that would cause a division by zero, which would lead to infinity as event.value.

You may also take into consideration whether event.value = 0 is a legal value if one of the input values is not (yet) defined.

Hope this can help.