How Much Does Dimensional Lumber Weigh?
Board weights by size and species, kiln-dried
A standard kiln-dried 2x4x8 weighs about 8 to 11 pounds, depending on species. Southern yellow pine sits at the heavy end, spruce-pine-fir at the light. Two things blow past those numbers fast: length, and whether the wood is pressure-treated or still green.
A 2x4x8 at a glance
Board weights below are for kiln-dried framing lumber. Green and pressure-treated stock weigh more.
Weight per board (8-foot, kiln-dried)
These are actual weights based on the milled dimensions of each board, not the nominal size. A "2x4" is really 1.5 by 3.5 inches, and the math uses those real numbers. Three common framing species are shown, heaviest to lightest.
| Board (8 ft) | Southern yellow pine | Douglas-fir | Spruce-pine-fir |
|---|---|---|---|
| 2x4 | 10.5 lbs | 9.9 lbs | 8.2 lbs |
| 2x6 | 16.5 lbs | 15.6 lbs | 12.8 lbs |
| 2x8 | 21.8 lbs | 20.5 lbs | 16.9 lbs |
| 2x10 | 27.8 lbs | 26.2 lbs | 21.6 lbs |
| 4x4 | 24.5 lbs | 23.1 lbs | 19.1 lbs |
Length scales the weight directly. A 2x4x12 is 1.5 times an 8-footer, so about 16 pounds in southern yellow pine.
Density by species
If your board isn't in the table, the density figure lets you work out any size: multiply the board's actual volume in cubic feet by the density.
| Species | Density (lb/ft³, kiln-dried) |
|---|---|
| Southern yellow pine | 36–41 |
| Douglas-fir | 34 |
| Hem-fir | 30 |
| Redwood | 28 |
| Spruce-pine-fir (SPF) | 24–29 |
| Western redcedar | 22 |
One exception: engineered structural lumber, the LVL, LSL, and PSL beams and headers hidden in floors and walls, runs denser and heavier than solid framing, commonly 35 to 45 pounds per cubic foot. If you're pulling out a header or beam, check the manufacturer's spec.
Tearing out a deck or fence? That lumber is treated, and heavier.
Pressure-treated wood is saturated with waterborne preservative, so it runs well above these kiln-dried numbers, especially when recently installed. It also can't go in clean-wood recycling; most areas require treated lumber to be landfilled. Don't burn it, either. Plan on a mixed-debris dumpster, not a clean-wood load.
What this means when you rent a dumpster
Kiln-dried framing is light for its bulk, so a demolition load of lumber is volume-limited, not weight-limited. A torn-out 12 by 16 deck frame might be 800 to 1,200 pounds of wood, well under any container's cap, but the joists and decking eat space quickly.
So size by volume and by how the boards break down. Long joists and stringers don't nest; they bridge across a dumpster and waste the space underneath. Cutting them down before loading is the single best way to fit more in a smaller box.
Where these numbers come from
Each species density comes from its specific gravity in the U.S. Forest Products Laboratory Wood Handbook, the federal reference for wood properties. Density at a standard 12% moisture content is specific gravity times 62.4 times 1.12, which for southern yellow pine works out to roughly 36 to 41 pounds per cubic foot.
Board weights use the real milled dimensions, which are smaller than the nominal size. A 2x4 is 1.5 by 3.5 inches and a 4x4 is 3.5 by 3.5, so an 8-foot 2x4 is 0.29 cubic feet; multiply by the density to get the weight. Green and pressure-treated lumber carry extra water and preservative, which is why we call those out separately rather than folding them into the table.
- Species density and specific gravity: USDA Forest Products Laboratory, Wood Handbook (FPL-GTR-282, 2021), Chapter 4, with per-species specific gravity from Chapter 5.
Estimate your project
Most lumber comes out of a deck, fence, or shed tear-out. These size the dumpster for the job.
Common questions
How much does a 2x4 weigh?
A kiln-dried 2x4x8 is about 8 to 11 pounds. Southern yellow pine is around 10.5, Douglas-fir about 10, and spruce-pine-fir near 8. Longer boards scale up in proportion.
How much does pressure-treated lumber weigh?
Much more than kiln-dried, especially fresh. A recently treated 2x4x8 can weigh 15 to 18 pounds instead of 10, because it's forced full of waterborne preservative. It loses some weight as it dries over months.
Will lumber overweight a dumpster?
Rarely. Lumber fills a container's volume before it hits the weight cap. A whole deck or shed frame is only a few hundred to a couple thousand pounds. The exception is a big load of wet pressure-treated wood, which is heavier and usually barred from clean-wood recycling.
Does green lumber weigh more than kiln-dried?
Yes, by 40 to 60 percent. Green lumber holds far more water than kiln-dried. The board weights on this page are for standard kiln-dried framing; green and pressure-treated stock run heavier.
Disclaimer: These weights are estimates for kiln-dried framing lumber at standard moisture. Actual weight varies with species, moisture, and grade. Green and pressure-treated lumber weigh more, and treated wood has disposal restrictions. For a large teardown, confirm dumpster sizing and treated-wood rules with your hauler.