How much does polystyrene weigh?
Polystyrene weighs 66 lb/ft³ (1,050 kg/m³).
Key Polystyrene Facts:
- Density: 1,050 kg/m³ (66 lb/ft³)
- Common uses: Packaging, insulation, disposable cups, and CD cases
Use this calculator to determine polystyrene weight by entering your dimensions below.
Formula: Weight = Volume × Density
Related Plastics Calculators:
Formula & Assumptions
Formula:
Weight = Volume × Density
Density Used:
Polystyrene: 66 lb/ft³ (1050 kg/m³)
Note:
Results are estimates based on average material densities. Actual weights may vary ±5% due to material composition and moisture content. For structural applications, verify with your supplier.

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