Lumber Weight

How much does a 2×4 weigh?

A Douglas Fir 2×4, 8 ft weighs 9.9 lb (4.5 kg) at 12% moisture content, kiln-dried.

33.9 lb/ft³ · 5.33 bd ft ·

At 8 ft and 12% moisture content, a 2×4 weighs anywhere from 6.6 lb in W. Red Cedar to 13.5 lb in White Oak, across the 29 species this site carries in that size.

2×4 nominal vs 1-1/2″ × 3-1/2″ actual
Dashed: nominal 2×4. Solid: actual dressed size, surfaced dry (PS 20-25).

A nominal 2×4 measures 1-1/2″ × 3-1/2″ once surfaced dry, per NIST PS 20-25 — the number every weight below actually uses.

2×4 weight by species

2×4, one piece, 8 ft at 12% MC
SpeciesSG (green)8 ft, 12% MCGreen rangeJanka lbf
Yellow Cedar 0.42 9.2 lb 10.7–21.6 lb 580
Baldcypress 0.42 9.2 lb 17.9–22.0 lb 510
Balsam Fir 0.33 7.1 lb 12.0–17.4 lb 380
Douglas Fir 0.45 9.9 lb 11.9–18.7 lb 710 wood info →
Eastern Hemlock 0.38 8.2 lb 14.5–16.1 lb 500
E. White Pine 0.34 7.3 lb 10.6–16.3 lb 380 wood info →
Engelmann Spruce 0.33 7.1 lb 9.6–17.4 lb 390
Grand Fir 0.35 7.6 lb 12.9–15.9 lb 490
Hem-Fir 0.42 9.2 lb 15.0–21.9 lb 540 wood info →
Douglas Fir (Int.) 0.46 10.1 lb 12.2–19.1 lb 660
Lodgepole Pine 0.38 8.2 lb 10.3–16.1 lb 480 wood info →
Longleaf Pine 0.54 12.0 lb 13.7–21.5 lb 870 wood info →
Ponderosa Pine 0.38 8.2 lb 10.3–18.2 lb 460 wood info →
Aspen 0.35 7.6 lb 13.2–14.4 lb 350
Red Oak 0.56 12.5 lb 18.3–19.5 lb 1,290
Red Pine 0.41 8.9 lb 10.4–18.5 lb 560
Red Spruce 0.37 8.0 lb 10.9–15.2 lb 530
Redwood 0.38 8.2 lb 13.6–22.7 lb 480 wood info →
Shortleaf Pine 0.47 10.4 lb 12.0–20.1 lb 690 wood info →
Sitka Spruce 0.37 8.0 lb 10.1–17.3 lb 510 wood info →
Southern Yellow Pine 0.47 10.4 lb 12.1–19.1 lb 690 wood info →
SPF 0.33 7.1 lb 9.7–13.6 lb 410 wood info →
Tamarack 0.49 10.8 lb 14.1 lb 590
Western Larch 0.48 10.6 lb 14.3–20.3 lb 830
W. Red Cedar 0.31 6.6 lb 9.5–20.9 lb 350 wood info →
W. White Pine 0.35 7.6 lb 10.9–16.8 lb 420
White Fir 0.37 8.0 lb 14.1–18.6 lb 480
White Oak 0.6 13.5 lb 19.0–20.6 lb 1,360
Yellow Poplar 0.4 8.7 lb 14.1–15.9 lb 540

Weights assume 12% moisture content and the actual dressed size shown above; green figures use each species' own heartwood-to-sapwood moisture range where the USDA Wood Handbook publishes one. Expect ±10-15% piece-to-piece variation in any real stack. How these are computed.