To calculate the gold weight of a 3D model, you will first need to find the volume of the model. This can be done in Rhino 3D by selecting the closed object and typing in "volume" and then Enter. The software will give you cubic millimeter of the object.
With the volume, you will then multiple it by karat of gold you would like it to be. See the density conversion cart below:
|Karat||Density (Grams per cubic millimeter)|
|14K Yellow Gold||0.0130681|
|14K White Gold||0.0126069|
|18K Yellow Gold||0.0155849|
|18K White Gold||0.0146378|
201mm3 x 0.0130681 = 2.6 g of 14K Yellow Gold