## Definition

The density of plastic is the weight of the plastic per its volume.

Plastics are usually labeled as polymers, as they are comprised of polymers. But plastics technically come from oil or petroleum.

ρ = m / V
• ρ:  Density
• m: mass
• V: Volume

### Density vs Specific Weight vs Specific Gravity

I would like to point out that there are conceptual differences between densityspecific weight and specific gravity. Follow the link if you want to learn more about these differences.

With that said, this page will provide you the plastic density in kg/m³ (SI unit), g/cm³, g/ml, kg/l, lb/ft³.

## Density of Plastic

I'll consider here the polyethylene (PE) as an example:

𝛒 = 0.95 g/cm³
𝛒 = 950 kg/m³
𝛒 = 0.95 g/ml
𝛒 = 950 g/L
𝛒 = 59.31 lb/ft³

Source: Tregaltd

## My Density Infographic

Put the plastic density in perspective!

How about an incentive to share this post? (You will help other colleagues find this blog)

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Materials: Density of Plastic 2022
Density of Plastic 2022