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Density of Plastics and Polymers

Room‑temperature density values for common plastics and polymers are listed below in g/cm³ and lbm/in³. Materials include ABS, acetal (POM), acrylic (PMMA), nylons (PA), PVC, PVDF, PBT, PC, PEEK, PE (LDPE/HDPE/UHMWPE), PP, PTFE, polyurethane, epoxies, silicones, and composites.

Density Unit Converter

Conversions: 1 g/cm³ = 0.0361273 lbm/in³ = 1000 kg/m³.

Room‑Temperature Density Values for Polymers
Material Density g/cm³ Density lbm/in³
ABS, Extrusion Grade1.0520.038
ABS, High Impact1.0240.037
Acetal, 20% Glass1.5500.056
Acetal, Copolymer1.4120.051
Acetal, Homopolymer1.4120.051
Acrylic (PMMA)1.1900.043
Butadiene‑acrylonitrile (Nitrile)0.980.0354
CPVC1.5500.056
Epoxy1.11 – 1.400.0401 – 0.0505
Fiberglass Sheet1.8550.067
Styrene‑butadiene (SBR)0.940.0339
Silicone1.1 – 1.60.040 – 0.058
Nylon 6, 30% Glass1.3840.050
Nylon 6, Cast1.1630.042
Nylon 6/6, Cast1.3010.047
Nylon 6/6, Extruded1.1350.041
PVC (Polyvinyl chloride)1.3840.050
PVDF (Polyvinylidene fluoride)1.7720.064
Phenolic1.280.0462
PBT (Polybutylene terephthalate)1.340.0484
PC (Polycarbonate)1.200.0433
Polyester (thermoset)1.04 – 1.460.038 – 0.053
PEEK (Polyetheretherketone)1.310.0473
LDPE (Low‑density polyethylene)0.9250.0334
HDPE (High‑density polyethylene)0.9590.0346
UHMWPE (Ultra‑high MW polyethylene)0.940.0339
PP (Polypropylene)0.9050.0327
PTFE (Polytetrafluoroethylene)2.170.0783
Polyurethane1.0520.038

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References