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Know Your Dimensions with Lumber Conversion Charts

Conversion Chart (Linear Feet to Board Feet)

Multiply your linear footage by the factor below to obtain the board footage. (Example: 1 x 8 x 8' multiply 8' by .667 = 5.33 board feet)

Width 4/4
(1")
5/4
(1 ¼")
6/4
(1 ½")
7/4
(1 ¾")
8/4
(2")
10/4
(2 ½")
12/4
(3")
16/4
(4")
1 .083 .104 .125 .146 .167 .208 .250 .333
2 .167 .208 .25 .292 .333 .417 .500 667
3 .250 .313 .375 .438 .500 .625 .750 1.000
4 .333 .417 .500 .583 .667 .833 1.000 1.333
5 .417 .521 .625 .729 .833 1.042 1.25 1.667
6 .500 .625 .750 .875 1.000 1.250 1.500 2.000
7 .583 .729 .875 1.021 1.167 1.458 1.750 2.333
8 .667 .833 1.000 1.167 1.333 1.667 2.000 2.667
9 .75 .938 1.125 1.313 1.500 1.875 2.250 3.000
10 .833 1.042 1.250 1.458 1.667 2.083 2.500 3.333
11 .917 1.146 1.375 1.604 1.833 2.292 2.750 3.667
12 1.000 1.250 1.5000 1.750 2.000 2.5000 3.000 4.000
13 1.083 1.354 1.625 1.896 2.167 2.708 3.250 4.333
14 1.167 1.458 1.750 2.042 2.333 2.917 3.5000 4.667
15 1.250 1.563 1.875 2.188 2.500 3.125 3.750 5.000
16 1.333 1.667 2.000 2.333 2.667 3.333 4.000 5.333
17 1.417 1.771 2.125 2.479 2.833 3.542 4.25 5.667
18 1.5000 1.875 2.250 2.625 3.000 3.750 4.500 6.000
19 1.583 1.979 2.375 2.771 3.167 3.958 4.750 6.333
20 1.667 2.083 2.500 2.917 3.333 4.167 5.000 6.667
21 1.750 2.188 2.625 3.063 3.500 4.375 5.250 7.000
22 1.833 2.292 2.750 3.208 3.667 4.583 5.500 7.333
23 1.917 2.396 2.875 3.354 3.833 4.792 5.750 7.667
24 2.000 2.500 3.000 3.500 4.000 5.000 6.000 8.00

Permission granted to copy and re-distribute PROVIDED proper credit is given to Compton Lumber Company, Inc. © 2016 Compton Lumber Company, Inc. - Seattle, WA. USA

Conversion Chart (Board Feet to Linear Feet)

Multiply your board footage by the factor below to obtain the linear footage. (Example: 50 bf of 2x8 = 37.5 linear feet)

Width 4/4
(1")
5/4
(1 ¼")
6/4
(1 ½")
7/4
(1 ¾")
8/4
(2")
10/4
(2 ½")
12/4
(3")
16/4
(4")
1 12.000 9.600 8.000 6.857 6.000 4.800 4.000 3.000
2 6.000 4.800 4.000 3.429 3.000 2.400 2.000 1.500
3 4.000 3.200 2.667 2.286 2.000 1.600 1.333 1.000
4 3.000 2.400 2.000 1.714 1.500 1.200 1.000 .750
5 2.400 1.92 1.600 1.371 1.200 .960 .800 .600
6 2.000 1.600 1.333 1.143 1.000 .800 .667 .500
7 1.714 1.371 1.143 .980 .857 .686 .571 .429
8 1.500 1.200 1.000 .857 .750 .600 .500 .375
9 1.333 1.067 .889 .762 .667 .533 .444 .333
10 1.200 .960 .800 .686 .600 .480 .400 .300
11 1.091 .873 .727 .623 .545 .436 .364 .273
12 1.000 .800 .667 .571 .500 .400 .333 .250
13 .923 .738 .615 .527 .462 .369 .308 .231
14 .857 .686 .571 .490 .429 .343 .286 .214
15 .800 .640 .533 .457 .400 .320 .267 .200
16 .750 .600 .500 .429 .375 .300 .250 .188
17 .706 .565 .471 .403 .353 .282 .235 .176
18 .667 .553 .444 .381 .333 .267 .222 .167
19 .632 .505 .421 .361 .316 .253 .211 .158
20 .600 .480 .400 .343 .300 .240 .200 .150
21 .571 .457 .381 .327 .286 .229 .190 .143
22 .545 .436 .361 .312 .273 .218 .182 .136
23 .522 .417 .348 .298 .261 .209 .174 .130
24 .500 .400 .333 .286 .250 .200 .167 .125

Permission granted to copy and re-distribute PROVIDED proper credit is given to Compton Lumber Company, Inc. © 2016 Compton Lumber Company, Inc. - Seattle, WA USA

Lumber Sizes

Dimensions are S4S (surfaced on 4 sides). 1" and 2" are typically kiln dried-thicker sizes are "Green" (air dried).

1x2 ¾ x 1 ½        
1x3 ¾ x 2 ½ 3x3 2 ½ x 2 ½    
1x4 ¾ x 3 ½ 3x4 2 ½ x 3 ½    
1x5 ¾ x 4 ½        
1x6 ¾ x 5 ½ 3x6 2 ½ x 5 ½ 6x6 5 ½ x 5 ½
1x7 ¾ x 6 ¼        
1x8 ¾ x 7 ¼ 3x8 2 ½ x 7 ¼ 6x8 5 ½ x 7 ¼
1x9 ¾ x 8 ¼        
1x10 ¾ x 9 ¼ 3x10 2 ½ x 9 ¼ 6x10 5 ½ x 9 ¼
1x11 ¾ x 10 ¼        
1x12 ¾ x 11 ¼ 3x12 2 ½ x 11 ¼ 6x12 5 ½ x 11 ¼
2x2 1 ½ x 1 ½        
2x3 1 ½ x 2 ½        
2x4 1 ½ x 3 ½ 4x4 3 ½ x 3 ½    
2x5 1 ½ x 4 ½        
2x6 1 ½ x 5 ½ 4x6 3 ½ x 5 ½    
2x8 1 ½ x 7 ¼ 4x8 3 ½ x 7 ¼ 8x8 7 ¼ x 7 ¼
2x10 1 ½ x 9 ¼ 4x10 3 ½ x 9 ¼ 8x10 7 ¼ x 9 ¼
2x12 1 ½ x 11 ¼ 4x12 3 ½ x 11 ¼ 8x12 7 ¼ x 11 ¼

Permission granted to copy and re-distribute PROVIDED proper credit is given to Compton Lumber Company, Inc. © 2016 Compton Lumber Company, Inc. - Seattle, WA USA