How much does a 6×6 weigh?

Species Size Length Condition Quantity

A Douglas Fir 6×6, 8 ft weighs 57.0 lb (25.8 kg) at 12% moisture content, kiln-dried.

33.9 lb/ft³ · 24.0 bd ft ·

At 8 ft and 12% moisture content, a 6×6 weighs anywhere from 38.3 lb in W. Red Cedar to 86.6 lb in Black Locust, across the 10 species this site carries in that size.

Dashed: nominal 6×6. Solid: actual dressed size, surfaced dry (PS 20-25).

A nominal 6×6 measures 5-1/2″ × 5-1/2″ once surfaced dry, per NIST PS 20-25 — the number every weight below actually uses.

6×6 weight by species

6×6, one piece, 8 ft at 12% MC
Species	SG (green)	8 ft, 12% MC	Green range	Janka lbf
Baldcypress	0.42	52.9 lb	97.4–119 lb	510
Black Locust	0.66	86.6 lb	—	1,700
Douglas Fir	0.45	57.0 lb	64.7–102 lb	710
Douglas Fir (Int.)	0.46	58.3 lb	66.1–104 lb	660
Longleaf Pine	0.54	69.4 lb	74.2–117 lb	870
Redwood	0.38	47.5 lb	74.2–124 lb	480
Southern Yellow Pine	0.47	59.7 lb	65.6–104 lb	690
Western Larch	0.48	61.1 lb	77.6–110 lb	830
W. Red Cedar	0.31	38.3 lb	51.4–114 lb	350
White Oak	0.6	77.9 lb	103–112 lb	1,360

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.