# Calculating Weight Of Plastic Parts

**Question asked by Charles Graves:**

I am trying to find the proper way to convert mass property information taken from 3d CAD models of plastic parts and generate the wieght of the part. I can easily get the mass of the model (in grams) and the volume of the model in cubic millimeters. I am looking for formula(s) to take this info and convert it into the part weight in grams. I do have available to me the specific gravity of various types of plastic material and I believe that this will have to be a part of that formula.

**Follow-up responses...**

### Formula!

*posted by Rick:*

If not, here is the formula I use:

volume in cc3 / 16.287 (constant) X specific gravity of material (constant) X .0361 (constant) X 454 (constant to convert to grams)

This will give you weight in grams.

### Formula

*posted by G.J.AVHAD:*

### Convert Volume To Weight

*posted by Harper Zarker:*

### Calculation Formula For Plastic

*posted by Prabhakar Aswar:*

### Alternate Material In Mold Design

*posted by Prabhakar Aswar:*

Plz Address.

### PP To HDPE Conversion

*posted by Adil Saleem:*

### Therotical Weight Of Plastic Compo.

*posted by ganesh wagh:*

### Calculate Plastic Part Weight

*posted by David Hodge:*

### I Want A Simple Weight Calculator

*posted by avinash:*

### Alloable Wastage

*posted by donya:*

i would like to find the relation between the allowable wastage of injected plastic fragments and the fragments dimensions , fragment weights and fragments shape.

for example a smaller fragment is less possible to brake when transferring than a big one.

although a fragment which has a complex shape is more possible to brake than a simple shaped fragment when transferring.

I thought there might be a formula or a table which can tell me the universal standards for this .

thank you very much