Just a quick re-cap, don't know all that much about measurements, etc., but do know a little. I know that the specific gravity of honey is 1.5, water of course is 1.0. When I used to measure fertilizers in my greenhouse for the seedlings, it would always call for grams. Now I have a problem with measuring things by weight everytime I wanted to do something. So I initially found out the weight of different chemicals. It was surprising how many have different weights per volume. It became very confusing, but finally I got it down pat. But I had to indicate on different packages of chemicals what the volume by weight was. It helped and they were all slightly different.
So getting to the point of weight per volume, you have to figure out the "weight" of the wax first, then the volume it takes up. Keep a permanent record then you will never have to recalculate. Hope something I said made sense. Or go to the sites that were listed in previous posts, it probably has a real simple way there. Great day. Cindi