Is their an easy way to figure out scales?

Take the scale you want, such as 1/72.  Divide 1 by 72 it will give you a decimal (.01388 for the example).  Then take the actual dimension and multiply it by the decimal.  This will give you the size in the scale you want.

Ok Cool.  Thank you.  I have been pulling my hair out for the last couple days after reading some stuff in the How to build diorama book i just bought.  It kind of boggled my mind a bit.

Easy.

Download  one of the FREE  Scale-Calculators or use one of the FREE Online ones.

Personally I use a scale-calculator I downloaded from the StarshipModeler-Site.

Small program that lives on my desktop and does a lot of stuff.

HTH.