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The Hartford Lumber Company 17 Albany Avenue
Hartford, Connecticut 06120 Phone: (860)522-9101
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Lumber Dimensions

Did you know 2 x 4's are not actually 2 inches by 4 inches? When the board is first rough cut at the lumber mill, it is a true 2" x 4", but the drying process and planing of the lumber reduce it to the finished 1.5" x 3.5" size. Below are the common sizes of lumber, and their actual sizes.

Nominal
Actual
Actual (Metric)
1" x 2"
3/4" x 1-1/2"
19 x 38 mm
1" x 3"
3/4" x 2-1/2"
19 x 64 mm
1" x 4"
3/4" x 3-1/2"
19 x 89 mm
1" x 5"
3/4" x 4-1/2"
19 x 114 mm
1" x 6"
3/4" x 5-1/2"
19 x 140 mm
1" x 7"
3/4" x 6-1/4"
19 x 159 mm
1" x 8"
3/4" x 7-1/4"
19 x 184 mm
1" x 10"
3/4" x 9-1/4"
19 x 235 mm
1" x 12"
3/4" x 11-1/4"
19 x 286 mm
1-1/4" x 4"
1" x 3-1/2"
25 x 89 mm
1-1/4" x 6"
1" x 5-1/2"
25 x 140 mm
1-1/4" x 8"
1" x 7-1/4"
25 x 184 mm
1-1/4" x 10"
1" x 9-1/4"
25 x 235 mm
1-1/4" x 12"
1" x 11-1/4"
25 x 286 mm
1-1/2" x 4"
1-1/4" x 3-1/2"
32 x 89 mm
1-1/2" x 6"
1-1/4" x 5-1/2"
32 x 140 mm
1-1/2" x 8"
1-1/4" x 7-1/4"
32 x 184 mm
1-1/2" x 10"
1-1/4" x 9-1/4"
32 x 235 mm
1-1/2" x 12"
1-1/4" x 11-1/4"
32 x 286 mm
2" x 4"
1-1/2" x 3-1/2"
38 x 89 mm
2" x 6"
1-1/2" x 5-1/2"
38 x 140 mm
2" x 8"
1-1/2" x 7-1/4"
38 x 184 mm
2" x 10"
1-1/2" x 9-1/4"
38 x 235 mm
2" x 12"
1-1/2" x 11-1/4"
38 x 286 mm
3" x 6"
2-1/2" x 5-1/2"
64 x 140 mm
4" x 4"
3-1/2" x 3-1/2"
89 x 89 mm
4" x 6"
3-1/2" x 5-1/2"
89 x 140 mm

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