Board Foot Log Rules
Table 1. Excerpted sections from the International, Doyle, and Scribner Decimal C board foot log rules.
Scaling diameter (inches)
Log length in feet
6
8
10
12
14
16
International 1/4 inch log scale, contents of logs in board feet
5
15
20
7
25
30
35
40
9
45
50
55
65
11
70
80
85
95
13
100
115
135
75
160
60
110
130
155
180
17
125
150
205
18
140
170
200
230
19
90
190
225
260
175
210
250
290
21
195
235
280
320
22
215
305
355
23
185
285
335
390
24
255
310
370
425
165
220
340
400
460
26
240
435
500
27
330
470
540
28
430
510
585
29
385
465
545
630
245
325
410
495
675
Doyle log scale, contents of logs in board feet
2
3
4
32
36
31
37
43
49
48
56
64
41
51
61
71
81
38
63
88
76
91
106
121
54
72
108
126
144
127
148
169
74
98
123
147
172
196
84
113
141
197
96
128
192
224
256
145
181
217
253
289
122
162
203
243
284
324
226
271
316
361
300
350
221
276
331
386
441
182
242
303
363
424
484
198
265
397
463
529
216
288
360
432
504
576
234
313
391
469
547