How much does a 4 × 8 sheet of 3/4 in plywood weigh?

Roughly 60 to 75 lb. Softwood plywood sits near the low end and hardwood or Baltic birch near the high end. Use the density from your supplier’s data sheet for a firm number.

Why does wood weight vary so much?

Water. Green alder runs about 45 lb/ft³ and air-dried alder about 28 lb/ft³. Catalog wood densities are for seasoned wood, so a damp board weighs more.

What density does it use for plastic and glass?

Acrylic is 1,163 kg/m³, polycarbonate 1,190, and glass 2,500. Check the data sheet for filled or reinforced grades, which run heavier.

Wood, Plastic & Panel Weight Calculator

Weigh plywood, MDF, plastic, and glass panels from size, thickness, and density.

Calculate panel weight

Enter the panel dimensions, quantity, and material density.

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Results

Weight unit

Total weight

19.63 lb

For the entered quantity and dimensions

Material density: 0.284 lb/in³
Total surface area: 16.06 ft²
Total volume: 69.12 in³

Isometric view · not to scale

L: 48 in
W: 24 in
t: 0.06 in

Material densities for wood, plastic, and panels

Browse standard reference densities for wood, engineered panels, plastics, composites, glass, rubber, ceramics, and metals, or use a supplier-specific custom density.

8 materials

Material	Family	Common names	kg/m³	lb/in³
Aluminum 5052-H32	Metal	—	2,680	0.097
Aluminum 6061-T6	Metal	—	2,720	0.098
Aluminum 7075-T6	Metal	—	2,810	0.102
Steel 1008 cold-rolled	Metal	—	7,850	0.284
Steel A36 HRPO	Metal	—	7,861	0.284
Galvanized steel G90	Metal	—	7,850	0.284
Stainless steel 304-2B	Metal	—	8,030	0.290
Stainless steel 316	Metal	—	7,990	0.289

How it works

Panel weight is length times width times thickness times density. Plastic and glass have steady densities, but wood and MDF do not. Species, glue, and moisture all move it. Use your supplier’s density when you have it.

How to use the calculator

1Enter the actual thickness, not the nominal. Plywood sold as 3/4 in is usually 23/32 in (0.719 in).
2Open All materials and search for the closest match, such as MDF, birch, acrylic, polycarbonate, or glass.
3If your supplier gives a weight per sheet or a density, pick Custom. Weight per sheet divided by the sheet volume is the density.

Full sheet of MDF

Inputs: One 48 × 96 × 0.750 in MDF panel at 710 kg/m³.
Result: Volume = 3,456 in³ and weight = 88.6 lb.

3,456 in³ is 2 ft³. MDF at 710 kg/m³ is 44.3 lb/ft³, so the panel weighs 88.6 lb. The catalog value is typical. Check your product’s data sheet.

What to know before using the result

How much does a 4 × 8 sheet of 3/4 in plywood weigh?: Roughly 60 to 75 lb. Softwood plywood sits near the low end and hardwood or Baltic birch near the high end. Use the density from your supplier’s data sheet for a firm number.
Why does wood weight vary so much?: Water. Green alder runs about 45 lb/ft³ and air-dried alder about 28 lb/ft³. Catalog wood densities are for seasoned wood, so a damp board weighs more.
What density does it use for plastic and glass?: Acrylic is 1,163 kg/m³, polycarbonate 1,190, and glass 2,500. Check the data sheet for filled or reinforced grades, which run heavier.

Formula

m = A × L × ρ

Area times length gives volume, and volume times density gives weight. For tube, the area is the outside shape minus the hollow.

Engineering references

Assumptions and limits

Sheet and plate are a flat rectangle or disc of even thickness. Holes and cutouts are not subtracted.
Rectangular tube has a constant wall: the inside corner radius is the outside radius minus the wall.
Pipe, conduit, and copper presets use nominal wall. Real pipe can run thinner.
Fittings, couplings, weld seams, and coatings are not included.

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