With lumber a board foot is calculated by:

multiplying THICKNES X WIDTH X LENGTH divided by 144 = BOARD FEET

(THICKNESS, WIDTH & LENGTH measurements are in inches)

DOYLE LOG RULE

for estimating board feet in a log

Length of log in feet

Text Box: Diameter of SMALLEST end of log measured inside the bark in inches
Text Box: Common lumber thickness & width in inches

Length of lumber in feet

LUMBER SCALE

for calculating board feet in lumber

*The DOYLE LOG RULE is a rough estimate of the board feet that a log may yield.

 

Bandsaw mills are able to recover many more board feet per log due to the thin blade profile that removes less waste in the form of sawdust.

 

Other factors that effect the actual

board feet a log will produce:

 

Branches or Limbs along the length of the log

Rotten spots or hollow logs

Foreign material imbedded in the log

Size of lumber the customer desires from the log

Website created and maintained by Eric Johnson, AEGD

Latest update: 01/09/2014

Copyright 2012/2013/2014

All Rights Reserved

 

6

8

10

12

14

16

6

2

2

3

3

4

4

7

3

5

6

7

8

9

8

6

8

10

12

14

16

9

9

13

16

19

22

25

10

14

18

23

27

32

36

11

18

25

31

37

43

49

12

24

32

40

48

56

64

13

30

41

51

61

71

81

14

38

50

63

75

88

100

15

45

61

76

91

106

121

16

54

72

90

108

126

144

17

63

85

106

127

148

169

18

74

98

123

147

172

196

19

84

113

141

169

197

225

20

96

128

160

192

224

256

21

108

145

181

217

253

289

22

122

162

203

243

284

324

23

135

181

226

271

316

361

24

150

200

250

300

350

400

25

165

221

276

331

386

441

26

182

242

303

363

424

484

27

198

265

331

397

463

529

28

216

288

360

432

504

576

29

234

313

391

469

547

625

30

254

338

423

507

592

676

 

6

8

10

12

14

16

1 x 3

1.5

2.0

2.5

3.0

3.5

4.0

1 x 4

2.0

2.6

3.3

4.0

4.6

5.3

1 x 5

2.5

3.3

4.0

5.0

6.0

6.6

1 x 6

3.0

4.0

5.0

6.0

7.0

8.0

1 x 7

3.5

4.6

6.0

7.0

8.0

9.3

1 x 8

4.0

5.3

6.6

8.0

9.3

10.6

1 x 10

5.0

6.6

8.3

10.0

11.6

13.3

1 x 12

6.0

8.0

10.0

12.0

14.0

16.0

2 x 4

4.0

5.3

6.6

8.0

9.3

10.6

2 x 6

6.0

8.0

10.0

12.0

14.0

16.0

2 x 8

8.0

10.6

13.3

16.0

18.6

21.3

2 x 10

10.0

13.3

16.6

20.0

23.3

26.6

2 x 12

12.0

16.0

20.0

24.0

28.0

32.0

2 x 14

14.0

18.0

23.3

28.0

32.6

37.3

3 x 6

9.0

12.0

15.0

18.0

21.0

24.0

3 x 8

12.0

16.0

20.0

24.0

28.0

32.0

3 x 10

15.0

20.0

25.0

30.0

35.0

40.0

3 x 12

18.0

24.0

30.0

36.0

42.0

48.0

4 x 4

8.0

10.6

13.3

16.0

18.6

21.3

6 x 6

18.0

24.0

30.0

36.0

42.0

48.0

6 x 8

24.0

32.0

40.0

48.0

56.0

64.0

7 x 9

31.5

42.0

52.5

63.0

73.5

84.0