SHEET MATERIAL
Softwood plywood: weight per sheet, thicknesses and sizes
Plywood with conifer veneers such as spruce or pine. The Handbook of Finnish Plywood gives mean densities of 520 kg/m³ with thin veneers and 460 kg/m³ with thick veneers; the Wood Handbook lists plywood at a specific gravity of 0.4–0.6.
Key figures
- Density
- 460–520 kg/m³Handbook of Finnish Plywood, mean at 65% relative humidity
- Thicknesses in the table
- 9 · 12 · 15 · 18 · 21 · 24 mmAs published by Finnish Forest Industries Federation
Weight per sheet
Volume × density, the same calculation as the weight calculator. Each cell uses the low and high ends of the source range as reference examples. For the panel you buy, use your supplier’s density instead of treating this range as a product specification.
| Thickness | 2,440 × 1,220 mm | 2,500 × 1,250 mm | 2,400 × 1,200 mm |
|---|---|---|---|
| 9 mm | 12.3–13.9 kg | 12.9–14.6 kg | 11.9–13.5 kg |
| 12 mm | 16.4–18.6 kg | 17.3–19.5 kg | 15.9–18.0 kg |
| 15 mm | 20.5–23.2 kg | 21.6–24.4 kg | 19.9–22.5 kg |
| 18 mm | 24.6–27.9 kg | 25.9–29.3 kg | 23.8–27.0 kg |
| 21 mm | 28.8–32.5 kg | 30.2–34.1 kg | 27.8–31.4 kg |
| 24 mm | 32.9–37.2 kg | 34.5–39.0 kg | 31.8–35.9 kg |
The sizes in the table are formats published by Finnish Forest Industries Federation. Sheet sizes and thicknesses vary by market and manufacturer: confirm what your supplier stocks.
Cutting, edges and fixing
Plywood is the stiffest common panel in Wood Handbook Table 12-1, with a modulus of elasticity of 6.96–8.55 GPa, which matters for shelves and long spans. The Finnish handbook notes that conifer plywood can have its face grain in either direction, so mark the grain before cutting.
Calculate with this material
Plywood or MDF? Choosing a sheet material · Screws and pilot holes