Is there a formula to calculate the approximate weight of a ring
blank with a known ID, OD, width, height, metal/karat, etc.?
I am trying to make a database from a few known weights (usually
sizes 6 and 10). When I try to use excel, for example, to make a
formula, I notice that it is not a set percentage increase or
decrease. (what I did was take a size 10 and the percentage
difference of that from a size 6..then divided it by 4 to get the
average % between sizes..however when I try to go from a 6 to a 7 or
7 to an 8 for example using those #s, it doesn't work) Also, I have
noticed, that the rounded outside rings are different than the flat
outsides, and the comfort fit are different from the flat insides,
and so on.
I know that it is very unlikely there is a definitive formula, and
since Im not a mathemitician Im not even sure how I would go about
starting this. But there has to be some sort of geometry formula with
area, cicrumference, taking volume of metal, etc into account where I
could get a close approximation.
Any help would be greatly appreciated.