Softwood Lumber - Dimensions | MEPKit Engineering Tools

Softwood Lumber Dimensions

Commercial softwood lumber dimension chart - nominal and actual sizes.

General rule converting nominal to actual softwood dimensions

Subtract 1/4 inch for dimensions under 2 inches (51 mm)
Subtract 1/2 inch for dimensions under 8 inches (200 mm)
Subtract 3/4 inch for larger dimensions

Material Classifications

Rough Lumber - sawn, trimmed and edged - faces are rough with saw marks
Surfaced Lumber (dressed) - Rough lumber that has been smoothed on one or more sides and edges by a surfacing machine
Worked Lumber - Surfaced lumber that has been matched and patterned

Notes

Weight is based on dry wood with 35 lb/ft³ (560 kg/m³) actual volume
Dry lumber is defined as lumber with less than 19% moisture
Unseasoned or green lumber is lumber with more than 19% moisture
1 lb/ft = 1.48 kg/m
1 in (inch) = 25.4 mm

Nominal Size (in x in)	Actual Size (in x in)	Actual Size (mm x mm)	Weight (lb/ft)
1 x 1	3/4 x 3/4	19 x 19	0.14
1 x 2	3/4 x 1 1/2	19 x 38	0.27
1 x 3	3/4 x 2 1/2	19 x 64	0.47
1 x 4	3/4 x 3 1/2	19 x 89	0.64
1 x 6	3/4 x 5 1/2	19 x 140	1.00
1 x 8	3/4 x 7 1/4	19 x 184	1.32
1 x 10	3/4 x 9 1/4	19 x 235	1.69
1 x 12	3/4 x 11 1/4	19 x 286	2.05
2 x 2	1 1/2 x 1 1/2	38 x 38	0.55
2 x 3	1 1/2 x 2 1/2	38 x 64	0.94
2 x 4	1 1/2 x 3 1/2	38 x 89	1.28
2 x 6	1 1/2 x 5 1/2	38 x 140	2.00
2 x 8	1 1/2 x 7 1/4	38 x 184	2.64
2 x 10	1 1/2 x 9 1/4	38 x 235	3.37
2 x 12	1 1/2 x 11 1/4	38 x 286	4.10
2 x 14	1 1/2 x 13 1/4	38 x 337	4.83
3 x 3	2 1/2 x 2 1/2	64 x 64	1.52
3 x 4	2 1/2 x 3 1/2	64 x 89	2.13
3 x 6	2 1/2 x 5 1/2	64 x 140	3.34
3 x 8	2 1/2 x 7 1/4	64 x 184	4.41
3 x 10	2 1/2 x 9 1/4	64 x 235	5.62
3 x 12	2 1/2 x 11 1/4	64 x 286	6.84
3 x 14	2 1/2 x 13 1/4	64 x 337	8.05
3 x 16	2 1/2 x 15 1/4	64 x 387	9.27
4 x 4	3 1/2 x 3 1/2	89 x 89	2.98
4 x 6	3 1/2 x 5 1/2	89 x 140	4.68
4 x 8	3 1/2 x 7 1/4	89 x 184	6.17
4 x 10	3 1/2 x 9 1/4	89 x 235	7.78
4 x 12	3 1/2 x 11 1/4	89 x 286	9.57
4 x 14	3 1/2 x 13 1/4	89 x 337	11.28
4 x 16	3 1/2 x 15 1/4	89 x 387	12.98

Nominal Size (in x in)

Actual Size (in x in)

Actual Size (mm x mm)

Weight (lb/ft)

1 x 1

3/4 x 3/4

19 x 19

0.14

1 x 2

3/4 x 1 1/2

19 x 38

0.27

1 x 3

3/4 x 2 1/2

19 x 64

0.47

1 x 4

3/4 x 3 1/2

19 x 89

0.64

1 x 6

3/4 x 5 1/2

19 x 140

1.00

1 x 8

3/4 x 7 1/4

19 x 184

1.32

1 x 10

3/4 x 9 1/4

19 x 235

1.69

1 x 12

3/4 x 11 1/4

19 x 286

2.05

2 x 2

1 1/2 x 1 1/2

38 x 38

0.55

2 x 3

1 1/2 x 2 1/2

38 x 64

0.94

2 x 4

1 1/2 x 3 1/2

38 x 89

1.28

2 x 6

1 1/2 x 5 1/2

38 x 140

2.00

2 x 8

1 1/2 x 7 1/4

38 x 184

2.64

2 x 10

1 1/2 x 9 1/4

38 x 235

3.37

2 x 12

1 1/2 x 11 1/4

38 x 286

4.10

2 x 14

1 1/2 x 13 1/4

38 x 337

4.83

3 x 3

2 1/2 x 2 1/2

64 x 64

1.52

3 x 4

2 1/2 x 3 1/2

64 x 89

2.13

3 x 6

2 1/2 x 5 1/2

64 x 140

3.34

3 x 8

2 1/2 x 7 1/4

64 x 184

4.41

3 x 10

2 1/2 x 9 1/4

64 x 235

5.62

3 x 12

2 1/2 x 11 1/4

64 x 286

6.84

3 x 14

2 1/2 x 13 1/4

64 x 337

8.05

3 x 16

2 1/2 x 15 1/4

64 x 387

9.27

4 x 4

3 1/2 x 3 1/2

89 x 89

2.98

4 x 6

3 1/2 x 5 1/2

89 x 140

4.68

4 x 8

3 1/2 x 7 1/4

89 x 184

6.17

4 x 10

3 1/2 x 9 1/4

89 x 235

7.78

4 x 12

3 1/2 x 11 1/4

89 x 286

9.57

4 x 14

3 1/2 x 13 1/4

89 x 337

11.28

4 x 16

3 1/2 x 15 1/4

89 x 387

12.98