Styrofoam (EPS) Weight Calculator

Standard white EPS foam (Type I) is usually 0.9-1.5 lb/ft³. High-density foam used in construction or flotation ranges from 2.0-3.0 lb/ft³. Packaging peanuts are around 0.6 lb/ft³.

A 4×8 foot sheet that's 2 inches thick has about 5.33 cubic feet of volume. At standard density (1.5 lb/ft³), it weighs approximately 8 pounds.

Styrofoam is a Dow Chemical trademark for extruded polystyrene (XPS), typically blue. Most white foam packaging and insulation is actually expanded polystyrene (EPS). They're similar materials with slightly different properties and densities.

Higher density EPS is stronger but heavier, affecting both shipping costs and protective capability. Lower density foam (0.9-1.2 lb/ft³) minimizes weight charges while still cushioning fragile items effectively.

Yes, EPS is recyclable (marked with #6), though not all curbside programs accept it. Many shipping stores and specialized recyclers will take clean EPS foam for compacting and reprocessing into new products.