How much does Red Oak lumber weigh?
A Red Oak 2×4, 8 ft weighs at 12% moisture content, kiln-dried.
43.0 lb/ft³ · 5.33 bd ft ·
Red Oak is a hardwood with a basic specific gravity of 0.56 (ovendry mass over green volume, USDA Wood Handbook Table 5-3b) — 43.0 lb/ft³ once dried to 12% moisture content. Its Janka side hardness is 1,290 lbf, the 7th hardest of the 46 species on this site. Green, freshly cut moisture content runs 80% in the heartwood to 69% in the sapwood. Total shrinkage from green to ovendry runs about 13.7% by volume.
Red Oak weight by size
| Size | Actual (dry) | 8 ft, 12% MC | Per foot | Green range |
|---|---|---|---|---|
| 1×2 | 3/4″ × 1-1/2″ | 2.7 lb | 0.34 lb/ft | 4.0–4.3 lb |
| 1×3 | 3/4″ × 2-1/2″ | 4.5 lb | 0.56 lb/ft | 6.6–7.0 lb |
| 1×4 | 3/4″ × 3-1/2″ | 6.3 lb | 0.78 lb/ft | 9.1–9.7 lb |
| 1×6 | 3/4″ × 5-1/2″ | 9.9 lb | 1.23 lb/ft | 14.4–15.4 lb |
| 1×8 | 3/4″ × 7-1/4″ | 13.0 lb | 1.62 lb/ft | 19.2–20.5 lb |
| 1×10 | 3/4″ × 9-1/4″ | 16.6 lb | 2.07 lb/ft | 24.4–25.9 lb |
| 1×12 | 3/4″ × 11-1/4″ | 20.1 lb | 2.52 lb/ft | 29.5–31.4 lb |
| 2×2 | 1-1/2″ × 1-1/2″ | 5.4 lb | 0.67 lb/ft | 8.0–8.5 lb |
| 2×3 | 1-1/2″ × 2-1/2″ | 9.0 lb | 1.12 lb/ft | 13.1–14.0 lb |
| 2×4 | 1-1/2″ × 3-1/2″ | 12.5 lb | 1.57 lb/ft | 18.3–19.5 lb |
| 2×6 | 1-1/2″ × 5-1/2″ | 19.7 lb | 2.46 lb/ft | 28.8–30.7 lb |
| 2×8 | 1-1/2″ × 7-1/4″ | 26.0 lb | 3.25 lb/ft | 38.5–41.0 lb |
| 2×10 | 1-1/2″ × 9-1/4″ | 33.1 lb | 4.14 lb/ft | 48.7–51.9 lb |
| 2×12 | 1-1/2″ × 11-1/4″ | 40.3 lb | 5.04 lb/ft | 59.0–62.8 lb |
| 4×4 | 3-1/2″ × 3-1/2″ | 29.3 lb | 3.66 lb/ft | 41.7–44.4 lb |
Board-to-board variation of ±10-15% is normal even within one species and size. How these numbers are computed.
Related
- All species: wood species index
- By density: Lighter: American Beech (SG 0.56) · Denser: Sugar Maple (SG 0.56)