International 1/4-Inch Log Volume (Board Feet)

Courtesy: Professor Gene Wengert

Note: An explanation follows the table

Dia. (inches)	Log Length (feet)
	6	8	10	12	14	16
6	5	10	10	15	15	20
7	10	10	15	20	25	30
8	10	15	20	25	35	40
9	15	20	30	35	45	50
10	20	30	35	45	55	65
11	25	35	45	55	70	80
12	30	45	55	70	85	95
13	40	55	70	85	100	115
14	45	65	80	100	115	135
15	55	75	95	115	135	160
16	60	85	110	130	155	180
17	70	95	125	150	180	205
18	80	110	140	170	200	230
19	90	125	155	190	225	260
20	100	135	175	210	250	290
21	115	155	195	235	280	320
22	125	170	215	260	305	355
23	140	185	235	285	335	390
24	150	205	255	310	370	425
25	165	220	280	340	400	460
26	180	240	305	370	435	500

Notes: This is based on the small end diameter, inside bark. For oval logs, measure the average diameter.

This scale is really close to the actual yield of lumber in a circular mill with 1/4-inch wide teeth. For a band mill, actual yields will be a little higher. Often logs are bought and sold on the Doyle or Scribner scales--these two scales are very close to each other. They underestimate the volume in smaller logs. This is useful for the sawmill as smaller logs have more handling costs. So, you could either scale the logs with the International 1/4-inch scale but then pay a lower price for small logs due to the increased handling, or you could scale the logs lower and then pay the same $/BF for all logs regardless of size.

Logs may also be graded, which is a quality measure, not volume measure.

Scribner Log Volume (Board Feet)

Diameter (inches)	Log Length (feet)
	6	8	10	12	14	16
6	5	5	10	10	10	20
7	5	10	10	20	20	30
8	10	10	20	20	20	30
9	10	20	30	30	30	40
10	20	30	30	30	40	60
11	20	30	40	40	50	70
12	30	40	50	60	70	80
13	40	50	60	70	80	100
14	40	60	70	90	100	110
15	50	70	90	110	120	140
16	60	80	100	120	140	160
17	70	90	120	140	160	180
18	80	110	130	160	190	210
19	90	120	150	180	210	240
20	110	140	170	210	240	280
21	120	150	190	230	270	300
22	130	170	210	250	290	330
23	140	190	230	280	330	380
24	150	210	250	300	350	400
25	170	230	290	340	400	460
26	190	250	310	370	440	500

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KnowledgeBase: Primary Processing

KnowledgeBase: Primary Processing: Yield Formulas

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