**Part Weight Calculation**

The weight of the molded part in grams should
be entered in this field. This input is used to calculate the material used
in the estimate. Three methods of calculation can be used in determining the
finished part weight. If a plastics part is available the actual weight in
grams should be entered. If an existing part is to be made from an alternate
plastics material, conversion of the new materials specific gravity should
be considered. The easiest and most accurate method to determine weigh of
new molded parts, is to use the mass properties function of the solid model
if available. The mass property in cm2 multiplied by the specific gravity
of the material to be used, will result in the part weight in grams. Specific
gravity of plastics materials can be found in the **GEPolymerlands** material
selector guide linked to this page. Calculating part weight by means of geometrically
dissecting to obtain the cubic area of the part, is time consuming and not
as accurate, but is a last resort to obtaining part weight.