Dimensional Lumber Weight • Complete Reference Chart

By Roof Online Staff • Updated October 1, 2022

See More Roofing Topics

Table of Contents

A stack of 2x10 boards. This is dimensional lumber. Weight for each board is about 39 lbs.
A stack of 2×10 boards. This is dimensional lumber. Weight for each board is about 39 lbs.

What is Dimensional Lumber?

Dimensional lumber is simply lumber that is produced with standardized dimensions. Standardized lumber dimensions, such as 2″ x 4″ or 2″ x 6″, allow for a multitude of efficiencies in construction.

Subcategories of dimensional lumber include appearance framing lumber, beams, joists, light framing lumber, planks, posts, stringers, structural light framing lumber, studs, and timbers. Our lumber weight chart below covers all of these.

Dimensional lumber is used for wall framing, rafters, and many other building components. Lumber weight is an important factor in various structural design considerations.

Lumber Weight Factors

Lumber weight depends on the length and cross-sectional dimensions of the board, the moisture content of the wood, and which tree species the lumber was made from.

Moisture will increase lumber weight. Green lumber has a higher moisture content than air-dried lumber, and air-dried lumber has a higher moisture content than oven-dried lumber.

Since almost all lumber will eventually reach the air-dried lumber weight, our chart just gives the weights for air-dried lumber.

Common construction lumber boards with the exact same dimensions but produced from different tree species may vary as much as 50% in weight, even with the same moisture content percentage.

An air-dried 2×4 x 8-foot-long lumber board made out of Douglas Fir weighs about 10 pounds. A board with the same dimensions made out of Sitka Spruce only weighs around 8 pounds.

Almost all lumber used for construction in the U.S. is made from spruce, pine, and fir, so our chart has weights for lumber made from all three.

Read on to learn more about lumber weights, or scroll to the end for the full weight chart.

Green or Oven-Dry Lumber Weights

Since almost all lumber tends to eventually arrive at the air-dried moisture content, variations in moisture content can be considered a temporary factor.

Green lumber has a higher moisture content than air-dried lumber, and air-dried lumber has a higher moisture content than oven-dried lumber.

Green lumber has a moisture content above 19% by definition.

Depending on the actual moisture content of a particular piece of lumber, which can be well above 100% due to the way the moisture content of wood is calculated, green lumber can weigh over 50% more than the same lumber when air-dried.

The typical weight of green lumber is roughly 10% to 30% more than the dried weight of lumber made from the same wood species.

Oven-dried wood (also called kiln-dried wood) normally starts off with a somewhat lower moisture content than air-dried wood, but tends to slowly absorb enough moisture from its environment to eventually reach the same moisture content as air-dried wood in the same environment.

For help figuring out the weight of green or oven-dry lumber for different wood species, to read more about how these weights are calculated, or to see an extensive list of the weights of other types of wood, see “Weights of Various Woods Grown in the United States” from the Forest Products Laboratory, United States Forest Service.

About Our Lumber Weight Chart

The following table provides the approximate weight (dead load, self-weight) per linear foot of the various sizes of dimensional lumber (also called “structural lumber” or “finished lumber”) used in building construction in the US.

The table provides the air-dried weight of lumber produced from three commonly used tree species: Sitka Spruce, Douglas Fir, and Southern Yellow Pine.

The values given in the table are meant to provide a general idea of typical lumber weights, and should not be used if precise values are needed for critical engineering calculations.

When precision is necessary, always refer to the specification sheet for the actual, specific product you intend to use, or contact the technical department of the producer.

You can see dimensional lumber at the Home Depot. The approximate weights of the actual pieces of lumber for sale are often given in the product descriptions, so this can be a pretty good resource for calculating lumber weights. Home Depot will also deliver lumber to your home, by the way.

Note: Longleaf Pine is a very heavy pine. See weights for other pines here. Another good page to look at to compare the weights of different kinds of wood is Weight of a 2×4 by Wood Type and Length.

Nominal vs. Actual Lumber Dimensions

For an explanation of the difference between nominal lumber dimensions and actual dimensions, see our Lumber Dimensions Table.

Table: Lumber Weight by Wood Type and Board Dimensions

Weight of Dimensional Lumber
Nominal
Dimensions
of Lumber
in Inches
Actual
Dimensions
of Lumber
in Inches
Sitka Spruce
Air Dried
Lumber Weight
(12% Moisture Content)
Douglas Fir
(Coast Variety)
Air Dried
Lumber Weight
(12% Moisture Content)
Southern Yellow Pine
(Longleaf Variety)
Air Dried
Lumber Weight
(12% Moisture Content)
Cubic Foot 12 x 12 x 12 28 Pounds
per Cubic Foot
34 Pounds
per Cubic Foot
41 Pounds
per Cubic Foot
Board Foot 12 x 12 x 1 2.33 Pounds
per Board Foot
2.83 Pounds
per Board Foot
3.41 Pounds
per Board Foot
Pounds Per Linear Foot: Pounds Per Linear Foot: Pounds Per Linear Foot:
1 inch x 2 inch 0.75 x 1.5 0.22 lb 0.27 lb 0.32 lb
1 x 3 0.75 x 2.5 0.36 lb 0.44 lb 0.53 lb
1 x 4 0.75 x 3.5 0.51 lb 0.62 lb 0.75 lb
1 x 6 0.75 x 5.5 0.80 lb 0.97 lb 1.17 lb
1 x 8 0.75 x 7.25 1.10 lb 1.34 lb 1.61 lb
1 x 10 0.75 x 9.25 1.35 lb 1.64 lb 1.98 lb
1 x 12 0.75 x 11.25 1.64 lb 1.99 lb 2.40 lb
2 x 2 1.5 x 1.5 0.44 lb 0.53 lb 0.64 lb
2 x 3 1.5 x 2.5 0.73 lb 0.89 lb 1.07 lb
2 x 4 1.5 x 3.5 1.02 lb 1.24 lb 1.49 lb
2 inch x 6 inch 1.5 x 5.5 1.60 lb 1.94 lb 2.34 lb
2 x 8 1.5 x 7.25 2.11 lb 2.56 lb 3.09 lb
2 x 10 1.5 x 9.25 2.70 lb 3.28 lb 3.95 lb
2 x 12 1.5 x 11.25 3.28 lb 3.98 lb 4.80 lb
2 x 14 1.5 x 13.25 3.86 lb 4.69 lb 5.65 lb
2 x 16 1.5 x 15.25 4.45 lb 5.40 lb 6.52 lb
3 x 4 2.5 x 3.5 1.70 lb 2.06 lb 2.49 lb
3 x 6 2.5 x 5.5 2.67 lb 3.24 lb 3.91 lb
3 x 8 2.5 x 7.25 3.52 lb 4.27 lb 5.15 lb
3 x 10 2.5 x 9.25 4.50 lb 5.46 lb 6.59 lb
3 inch x 12 inch 2.5 x 11.25 5.47 lb 6.64 lb 8.01 lb
3 x 14 2.5 x 13.25 6.44 lb 7.82 lb 9.43 lb
3 x 16 2.5 x 15.25 7.41 lb 9.00 lb 10.85 lb
4 x 4 3.5 x 3.5 2.38 lb 2.89 lb 3.49 lb
4 x 6 3.5 x 5.5 3.74 lb 4.54 lb 5.48 lb
4 x 8 3.5 x 7.25 4.93 lb 5.99 lb 7.22 lb
4 x 10 3.5 x 9.25 6.30 lb 7.65 lb 9.23 lb
4 x 12 3.5 x 11.25 7.66 lb 9.30 lb 11.22 lb
4 x 14 3.5 x 13.25 9.02 lb 10.95 lb 13.21 lb
4 x 16 3.5 x 15.25 10.38 lb 12.60 lb 15.20 lb
6 inch x 6 inch 5.5 x 5.5 5.88 lb 7.14 lb 8.61 lb
6 x 8 5.5 x 7.25 7.75 lb 9.41 lb 11.35 lb
6 x 10 5.5 x 9.25 9.89 lb 12.01 lb 14.48 lb
6 x 12 5.5 x 11.25 12.03 lb 14.61 lb 17.62 lb
6 x 14 5.5 x 13.25 14.17 lb 17.21 lb 20.75 lb
6 x 16 5.5 x 15 16.04 lb 19.48 lb 23.49 lb
8 x 8 7.25 x 7.25 10.22 lb 12.41 lb 14.97 lb
8 x 10 7.25 x 9.25 13.04 lb 15.83 lb 19.09 lb
8 x 12 7.25 x 11.25 15.86 lb 19.26 lb 23.22 lb
8 x 14 7.25 x 13.25 18.68 lb 22.68 lb 27.35 lb
8 inch x 16 inch 7.25 x 15 21.15 lb 25.68 lb 30.97 lb
8 x 18 7.25 x 17 23.97 lb 29.11 lb 35.10 lb
10 x 10 9.25 x 9.25 16.64 lb 20.21 lb 24.37 lb
10 x 12 9.25 x 11.25 20.23 lb 24.57 lb 29.62 lb
10 x 14 9.25 x 13.25 23.83 lb 28.94 lb 34.89 lb
10 x 16 9.25 x 15 26.98 lb 32.76 lb 39.51 lb
10 x 18 9.25 x 17 30.58 lb 37.13 lb 44.78 lb
12 x 12 11.25 x 11.25 24.61 lb 29.88 lb 36.04 lb
12 x 14 11.25 x 13.25 28.98 lb 35.19 lb 42.44 lb
10 x 12 9.25 x 11.25 20.23 lb 24.57 lb 29.62 lb
10 inch x 14 inch 9.25 x 13.25 23.83 lb 28.94 lb 34.89 lb
10 x 16 9.25 x 15 26.98 lb 32.76 lb 39.51 lb
10 x 18 9.25 x 17 30.58 lb 37.13 lb 44.78 lb
12 x 12 11.25 x 11.25 24.61 lb 29.88 lb 36.04 lb
12 x 14 11.25 x 13.25 28.98 lb 35.19 lb 42.44 lb
12 x 16 11.25 x 15 32.81 lb 39.84 lb 48.04 lb

How to Calculate Lumber Weight

The formula for the weight of lumber is simply density x volume. Determining the weight of an actual board is a little more involved.

Step 1Determine the wood type.

To determine lumber weight, you need to know what kind of wood the lumber is made from.

Step 2Look up the density of the wood.

Once you know the species of the wood that you’re dealing with, look up the density of that wood.

Wood density, at least in the United States, is expressed as pounds per cubic foot.

Weights of Various Woods Grown in the United States contains an extensive list of wood species you can refer to. There are plenty of other resources on the internet with the same information.

Step 3Calculate the volume in cubic inches of a one-foot-long section of the board.

You will need this value to figure out what percentage of a cubic foot a one-foot-long piece of your lumber is by volume.

Don’t use the nominal size of the board for this, be sure to look up the actual dimensions for the lumber in question.

As an example, let’s say you’re trying to figure out the weight of a piece of 2×2 lumber. Since a 2×2 is actually 1.5 inches by 1.5 inches, a one-foot-long 2×2 will have a volume in cubic inches of 1.5 x 1.5 x 12, or 27 cubic inches.

Step 4Determine what percentage of a cubic foot the volume of a one-foot-long section of your board is.

A cubic foot is equal to 12 inches x 12 inches x 12 inches, or 1,728 cubic inches. To continue our example, we know that a one foot long 2×2 is 27 cubic inches.

So:

27 is 1/64 of 1,728, or 1.5625% of a cubic foot (27/1728 x 100 = 1.5625).

Step 5Multiply the density in pounds per cubic foot of your wood species by the percentage from the previous step.

Let’s say you’re trying to figure out the weight of a 2×2 made out of Sitka spruce. You look up the density of Sitka spruce and see that it’s 28 pounds per cubic foot.

You then multiply 28 pounds by 1.5625% (28 x 0.015625) to get 0.4375 pounds. (We’d round this to 0.44 to be practical.)

0.44 pounds is the weight of a one foot section of 2×2 lumber made from Sitka spruce.

Step 6Multiply the weight of the one foot section by the length of the board.

If your 2×2 is 12 feet long, multiply 12 by 0.44 to get 5.28 pounds.

And there you go, a 12-foot Sitka spruce 2×2 weighs 5.28 pounds.

And that’s how you can calculate lumber weight.