The following table provides the approximate weight per linear foot of pressure-treated lumber. Southern Yellow Pine was used for the calculations because it is used to make around 85% of the pressure-treated wood in the US.

See Weight of Dimensional Lumber for the weights of other wood species commonly used for lumber.

Weight of Pressure-Treated Lumber
(Southern Yellow Pine)
Nominal
Dimensions
of Lumber
Actual
Dimensions
of Lumber
Untreated
Lumber Weight
(Air Dried)
Freshly Treated
Lumber Weight
(Maximum)
Treated
Lumber Weight
After Drying
In Inches In Inches 41 pounds
per cubic foot
73 pounds
per cubic foot
41.6 pounds
per cubic foot
1 x 2 0.75 x 1.5 0.32 lbs
per linear foot
0.57 lbs
per linear foot
0.32 lbs
per linear foot
1 x 3 0.75 x 2.5 0.53 0.94 0.54
1 x 4 0.75 x 3.5 0.75 1.34 0.76
1 x 6 0.75 x 5.5 1.17 2.08 1.18
1 x 8 0.75 x 7.25 1.61 2.867 1.63
1 x 10 0.75 x 9.25 1.98 3.52 2.00
1 x 12 0.75 x 11.25 2.40 4.27 2.42
2 x 3 1.5 x 2.5 1.07 1.90 1.08
2 x 4 1.5 x 3.5 1.49 2.65 1.50
2 x 6 1.5 x 5.5 2.34 4.17 2.36
2 x 8 1.5 x 7.25 3.09 5.50 3.12
2 x 10 1.5 x 9.25 3.95 7.03 3.99
2 x 12 1.5 x 11.25 4.80 8.54 4.85
2 x 14 1.5 x 13.25 5.65 10.06 5.71
2 x 16 1.5 x 15.25 6.52 11.61 6.58
3 x 4 2.5 x 3.5 2.49 4.43 2.51
3 x 6 2.5 x 5.5 3.91 6.96 3.95
3 x 8 2.5 x 7.25 5.15 9.17 5.20
3 x 10 2.5 x 9.25 6.59 11.73 6.65
3 x 12 2.5 x 11.25 8.01 14.26 8.09
3 x 14 2.5 x 13.25 9.43 16.79 9.52
3 x 16 2.5 x 15.25 10.85 19.31 10.96
4 x 4 3.5 x 3.5 3.49 6.21 3.52
4 x 6 3.5 x 5.5 5.48 9.75 5.53
4 x 8 3.5 x 7.25 7.22 12.85 7.29
4 x 10 3.5 x 9.25 9.23 16.43 9.32
4 x 12 3.5 x 11.25 11.22 19.97 11.33
4 x 14 3.5 x 13.25 13.21 23.51 13.34
4 x 16 3.5 x 15.25 15.20 27.06 15.35
6 x 6 5.5 x 5.5 8.61 15.33 8.69
6 x 8 5.5 x 7.25 11.35 20.20 11.46
6 x 10 5.5 x 9.25 14.48 25.77 14.62
6 x 12 5.5 x 11.25 17.62 31.36 17.79
6 x 14 5.5 x 13.25 20.75 36.94 20.95
6 x 16 5.5 x 15 23.49 41.81 23.72
8 x 8 7.25 x 7.25 14.97 26.65 15.12
8 x 10 7.25 x 9.25 19.09 33.98 19.28
8 x 12 7.25 x 11.25 23.22 41.33 23.45
8 x 14 7.25 x 13.25 27.35 48.68 27.62
8 x 16 7.25 x 15 30.97 55.13 31.27
8 x 18 7.25 x 17 35.10 62.48 35.44
10 x 10 9.25 x 9.25 24.37 43.38 24.61
10 x 12 9.25 x 11.25 29.62 52.72 29.91
10 x 14 9.25 x 13.25 34.89 62.10 35.23
10 x 16 9.25 x 15 39.51 70.33 39.90
10 x 18 9.25 x 17 44.78 79.71 45.22
12 x 12 11.25 x 11.25 36.04 64.15 36.39
12 x 14 11.25 x 13.25 42.44 75.54 42.86
12 x 16 11.25 x 15 48.04 85.51 48.51