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Dimensional lumber: actual sizes of 1x2 to 6x6, 8 to 16 ft (2x4 = 1-1/2 × 3-1/2 in)

What are the actual dimensions of a 2x4? · Standard part · basis: US softwood lumber standard (DOC PS 20), dry dressed sizes: nominal 1 in = 3/4 in, 2 in = 1-1/2 in, 4 in = 3-1/2 in; widths to 6 in lose 1/2 in, 8 in and up lose 3/4 in

Exact dimensions. True size, with no printing tolerance added.

sizes
17 in table

Notes

  • Drawn square-edged at the dressed size; real boards have eased (rounded) edges about 1/8 in.
  • Pre-cut studs: 92-5/8 in (with a bottom plate and a double top plate makes an 8 ft wall) and 104-5/8 in (9 ft).

Sizes

nominalthickness_inwidth_inthickness_mmwidth_mm
1x23/41-1/219.038.1
1x33/42-1/219.063.5
1x43/43-1/219.088.9
1x63/45-1/219.0139.7
1x83/47-1/419.0184.1
1x103/49-1/419.0234.9
1x123/411-1/419.0285.8
2x21-1/21-1/238.138.1
2x31-1/22-1/238.163.5
2x41-1/23-1/238.188.9
2x61-1/25-1/238.1139.7
2x81-1/27-1/438.1184.1
2x101-1/29-1/438.1234.9
2x121-1/211-1/438.1285.8
4x43-1/23-1/288.988.9
4x63-1/25-1/288.9139.7
6x65-1/25-1/2139.7139.7

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

NIST / ALSCVoluntary Product Standard DOC PS 20, American Softwood Lumber StandardstandardNIST / ALSC; dimensions are facts verify

Free files

★ Free files 72 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

lumber-1x2-8ft1x2 × 8 ft: actual 3/4 × 1-1/2 in (19.0 × 38.1 mm), 2438 mm longSTEP · STL
lumber-1x2-10ft1x2 × 10 ft: actual 3/4 × 1-1/2 in (19.0 × 38.1 mm), 3048 mm longSTEP · STL
lumber-1x2-12ft1x2 × 12 ft: actual 3/4 × 1-1/2 in (19.0 × 38.1 mm), 3658 mm longSTEP · STL
lumber-1x2-16ft1x2 × 16 ft: actual 3/4 × 1-1/2 in (19.0 × 38.1 mm), 4877 mm longSTEP · STL
lumber-1x3-8ft1x3 × 8 ft: actual 3/4 × 2-1/2 in (19.0 × 63.5 mm), 2438 mm longSTEP · STL
lumber-1x3-10ft1x3 × 10 ft: actual 3/4 × 2-1/2 in (19.0 × 63.5 mm), 3048 mm longSTEP · STL
lumber-1x3-12ft1x3 × 12 ft: actual 3/4 × 2-1/2 in (19.0 × 63.5 mm), 3658 mm longSTEP · STL
lumber-1x3-16ft1x3 × 16 ft: actual 3/4 × 2-1/2 in (19.0 × 63.5 mm), 4877 mm longSTEP · STL
lumber-1x4-8ft1x4 × 8 ft: actual 3/4 × 3-1/2 in (19.0 × 88.9 mm), 2438 mm longSTEP · STL
lumber-1x4-10ft1x4 × 10 ft: actual 3/4 × 3-1/2 in (19.0 × 88.9 mm), 3048 mm longSTEP · STL
lumber-1x4-12ft1x4 × 12 ft: actual 3/4 × 3-1/2 in (19.0 × 88.9 mm), 3658 mm longSTEP · STL
lumber-1x4-16ft1x4 × 16 ft: actual 3/4 × 3-1/2 in (19.0 × 88.9 mm), 4877 mm longSTEP · STL
lumber-1x6-8ft1x6 × 8 ft: actual 3/4 × 5-1/2 in (19.0 × 139.7 mm), 2438 mm longSTEP · STL
lumber-1x6-10ft1x6 × 10 ft: actual 3/4 × 5-1/2 in (19.0 × 139.7 mm), 3048 mm longSTEP · STL
lumber-1x6-12ft1x6 × 12 ft: actual 3/4 × 5-1/2 in (19.0 × 139.7 mm), 3658 mm longSTEP · STL
lumber-1x6-16ft1x6 × 16 ft: actual 3/4 × 5-1/2 in (19.0 × 139.7 mm), 4877 mm longSTEP · STL
lumber-1x8-8ft1x8 × 8 ft: actual 3/4 × 7-1/4 in (19.0 × 184.1 mm), 2438 mm longSTEP · STL
lumber-1x8-10ft1x8 × 10 ft: actual 3/4 × 7-1/4 in (19.0 × 184.1 mm), 3048 mm longSTEP · STL
lumber-1x8-12ft1x8 × 12 ft: actual 3/4 × 7-1/4 in (19.0 × 184.1 mm), 3658 mm longSTEP · STL
lumber-1x8-16ft1x8 × 16 ft: actual 3/4 × 7-1/4 in (19.0 × 184.1 mm), 4877 mm longSTEP · STL
lumber-1x10-8ft1x10 × 8 ft: actual 3/4 × 9-1/4 in (19.0 × 234.9 mm), 2438 mm longSTEP · STL
lumber-1x10-10ft1x10 × 10 ft: actual 3/4 × 9-1/4 in (19.0 × 234.9 mm), 3048 mm longSTEP · STL
lumber-1x10-12ft1x10 × 12 ft: actual 3/4 × 9-1/4 in (19.0 × 234.9 mm), 3658 mm longSTEP · STL
lumber-1x10-16ft1x10 × 16 ft: actual 3/4 × 9-1/4 in (19.0 × 234.9 mm), 4877 mm longSTEP · STL
lumber-1x12-8ft1x12 × 8 ft: actual 3/4 × 11-1/4 in (19.0 × 285.8 mm), 2438 mm longSTEP · STL
lumber-1x12-10ft1x12 × 10 ft: actual 3/4 × 11-1/4 in (19.0 × 285.8 mm), 3048 mm longSTEP · STL
lumber-1x12-12ft1x12 × 12 ft: actual 3/4 × 11-1/4 in (19.0 × 285.8 mm), 3658 mm longSTEP · STL
lumber-1x12-16ft1x12 × 16 ft: actual 3/4 × 11-1/4 in (19.0 × 285.8 mm), 4877 mm longSTEP · STL
lumber-2x2-8ft2x2 × 8 ft: actual 1-1/2 × 1-1/2 in (38.1 × 38.1 mm), 2438 mm longSTEP · STL
lumber-2x2-10ft2x2 × 10 ft: actual 1-1/2 × 1-1/2 in (38.1 × 38.1 mm), 3048 mm longSTEP · STL
lumber-2x2-12ft2x2 × 12 ft: actual 1-1/2 × 1-1/2 in (38.1 × 38.1 mm), 3658 mm longSTEP · STL
lumber-2x2-16ft2x2 × 16 ft: actual 1-1/2 × 1-1/2 in (38.1 × 38.1 mm), 4877 mm longSTEP · STL
lumber-2x3-8ft2x3 × 8 ft: actual 1-1/2 × 2-1/2 in (38.1 × 63.5 mm), 2438 mm longSTEP · STL
lumber-2x3-10ft2x3 × 10 ft: actual 1-1/2 × 2-1/2 in (38.1 × 63.5 mm), 3048 mm longSTEP · STL
lumber-2x3-12ft2x3 × 12 ft: actual 1-1/2 × 2-1/2 in (38.1 × 63.5 mm), 3658 mm longSTEP · STL
lumber-2x3-16ft2x3 × 16 ft: actual 1-1/2 × 2-1/2 in (38.1 × 63.5 mm), 4877 mm longSTEP · STL
lumber-2x4-8ft2x4 × 8 ft: actual 1-1/2 × 3-1/2 in (38.1 × 88.9 mm), 2438 mm longSTEP · STL
lumber-2x4-10ft2x4 × 10 ft: actual 1-1/2 × 3-1/2 in (38.1 × 88.9 mm), 3048 mm longSTEP · STL
lumber-2x4-12ft2x4 × 12 ft: actual 1-1/2 × 3-1/2 in (38.1 × 88.9 mm), 3658 mm longSTEP · STL
lumber-2x4-16ft2x4 × 16 ft: actual 1-1/2 × 3-1/2 in (38.1 × 88.9 mm), 4877 mm longSTEP · STL
lumber-2x4-stud-92.625in2x4 pre-cut stud 92.625 in (8 ft wall stud): actual 1-1/2 × 3-1/2 inSTEP · STL
lumber-2x4-stud-104.625in2x4 pre-cut stud 104.625 in (9 ft wall stud): actual 1-1/2 × 3-1/2 inSTEP · STL
lumber-2x6-8ft2x6 × 8 ft: actual 1-1/2 × 5-1/2 in (38.1 × 139.7 mm), 2438 mm longSTEP · STL
lumber-2x6-10ft2x6 × 10 ft: actual 1-1/2 × 5-1/2 in (38.1 × 139.7 mm), 3048 mm longSTEP · STL
lumber-2x6-12ft2x6 × 12 ft: actual 1-1/2 × 5-1/2 in (38.1 × 139.7 mm), 3658 mm longSTEP · STL
lumber-2x6-16ft2x6 × 16 ft: actual 1-1/2 × 5-1/2 in (38.1 × 139.7 mm), 4877 mm longSTEP · STL
lumber-2x6-stud-92.625in2x6 pre-cut stud 92.625 in (8 ft wall stud): actual 1-1/2 × 5-1/2 inSTEP · STL
lumber-2x6-stud-104.625in2x6 pre-cut stud 104.625 in (9 ft wall stud): actual 1-1/2 × 5-1/2 inSTEP · STL
lumber-2x8-8ft2x8 × 8 ft: actual 1-1/2 × 7-1/4 in (38.1 × 184.1 mm), 2438 mm longSTEP · STL
lumber-2x8-10ft2x8 × 10 ft: actual 1-1/2 × 7-1/4 in (38.1 × 184.1 mm), 3048 mm longSTEP · STL
lumber-2x8-12ft2x8 × 12 ft: actual 1-1/2 × 7-1/4 in (38.1 × 184.1 mm), 3658 mm longSTEP · STL
lumber-2x8-16ft2x8 × 16 ft: actual 1-1/2 × 7-1/4 in (38.1 × 184.1 mm), 4877 mm longSTEP · STL
lumber-2x10-8ft2x10 × 8 ft: actual 1-1/2 × 9-1/4 in (38.1 × 234.9 mm), 2438 mm longSTEP · STL
lumber-2x10-10ft2x10 × 10 ft: actual 1-1/2 × 9-1/4 in (38.1 × 234.9 mm), 3048 mm longSTEP · STL
lumber-2x10-12ft2x10 × 12 ft: actual 1-1/2 × 9-1/4 in (38.1 × 234.9 mm), 3658 mm longSTEP · STL
lumber-2x10-16ft2x10 × 16 ft: actual 1-1/2 × 9-1/4 in (38.1 × 234.9 mm), 4877 mm longSTEP · STL
lumber-2x12-8ft2x12 × 8 ft: actual 1-1/2 × 11-1/4 in (38.1 × 285.8 mm), 2438 mm longSTEP · STL
lumber-2x12-10ft2x12 × 10 ft: actual 1-1/2 × 11-1/4 in (38.1 × 285.8 mm), 3048 mm longSTEP · STL
lumber-2x12-12ft2x12 × 12 ft: actual 1-1/2 × 11-1/4 in (38.1 × 285.8 mm), 3658 mm longSTEP · STL
lumber-2x12-16ft2x12 × 16 ft: actual 1-1/2 × 11-1/4 in (38.1 × 285.8 mm), 4877 mm longSTEP · STL
lumber-4x4-8ft4x4 × 8 ft: actual 3-1/2 × 3-1/2 in (88.9 × 88.9 mm), 2438 mm longSTEP · STL
lumber-4x4-10ft4x4 × 10 ft: actual 3-1/2 × 3-1/2 in (88.9 × 88.9 mm), 3048 mm longSTEP · STL
lumber-4x4-12ft4x4 × 12 ft: actual 3-1/2 × 3-1/2 in (88.9 × 88.9 mm), 3658 mm longSTEP · STL
lumber-4x4-16ft4x4 × 16 ft: actual 3-1/2 × 3-1/2 in (88.9 × 88.9 mm), 4877 mm longSTEP · STL
lumber-4x6-8ft4x6 × 8 ft: actual 3-1/2 × 5-1/2 in (88.9 × 139.7 mm), 2438 mm longSTEP · STL
lumber-4x6-10ft4x6 × 10 ft: actual 3-1/2 × 5-1/2 in (88.9 × 139.7 mm), 3048 mm longSTEP · STL
lumber-4x6-12ft4x6 × 12 ft: actual 3-1/2 × 5-1/2 in (88.9 × 139.7 mm), 3658 mm longSTEP · STL
lumber-4x6-16ft4x6 × 16 ft: actual 3-1/2 × 5-1/2 in (88.9 × 139.7 mm), 4877 mm longSTEP · STL
lumber-6x6-8ft6x6 × 8 ft: actual 5-1/2 × 5-1/2 in (139.7 × 139.7 mm), 2438 mm longSTEP · STL
lumber-6x6-10ft6x6 × 10 ft: actual 5-1/2 × 5-1/2 in (139.7 × 139.7 mm), 3048 mm longSTEP · STL
lumber-6x6-12ft6x6 × 12 ft: actual 5-1/2 × 5-1/2 in (139.7 × 139.7 mm), 3658 mm longSTEP · STL
lumber-6x6-16ft6x6 × 16 ft: actual 5-1/2 × 5-1/2 in (139.7 × 139.7 mm), 4877 mm longSTEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=dimensional-lumber

Dimensional lumber: actual sizes of 1x2 to 6x6, 8 to 16 ft (2x4 = 1-1/2 × 3-1/2 in), isometric render of a generated part
Render of lumber-2x4-8ft from the free STEP; not to scale.

Fits with

Plywood and drywall sheets: 4 × 8 ft at actual thickness (3/4 in plywood = 23/32 in), isometric render of a generated part
Plywood and drywall sheets: 4 × 8 ft at actual thickness (3/4 in plywood = 23/32 in)9 sizes★ 13 files
Brick and concrete block sizes: US modular, UK, DIN 105 and CMU 4 to 12 in, isometric render of a generated part
Brick and concrete block sizes: US modular, UK, DIN 105 and CMU 4 to 12 in12 sizes★ 12 files
EUR / EPAL pallet: 1200 × 800 × 144 mm, isometric render of a generated part
EUR / EPAL pallet: 1200 × 800 × 144 mm1 sizes★ 1 file

Questions

Actual size of a 2x4?

1-1/2 × 3-1/2 in (38 × 89 mm).

Actual size of a 4x4?

3-1/2 × 3-1/2 in (89 × 89 mm).