Conversion Factors - Board Foot & Cubic Volume

Dbh	Cubic Feet to bd. ft.			Doyle to	Int to	Scrib to	Int to	Doyle to	Scrib to
Dbh	Doyle	Scrib	Int	Int	Doyle	Int	Scrib	Scrib	Doyle
In. ———————————–Ratios———————————-
10	2.30	4.45	5.90	2.56	0.39	1.325	0.755	1.93	0.52
11	2.70	4.85	6.05	2.24	0.45	1.250	0.800	1.80	0.56
12	3.00	5.10	6.20	2.07	0.48	1.210	0.825	1.70	0.59
13	3.40	5.35	6.35	1.87	0.54	1.185	0.845	1.57	0.64

14	3.70	5.55	6.50	1.76	0.57	1.170	0.855	1.50	0.67
15	4.00	5.70	6.60	1.65	0.61	1.155	0.865	1.43	0.70
16	4.20	5.85	6.70	1.60	0.63	1.140	0.875	1.39	0.72
17	4.40	6.00	6.80	1.54	0.65	1.130	0.885	1.36	0.73

18	4.70	6.15	6.85	1.46	0.69	1.115	0.895	1.31	0.76
19	4.90	6.25	6.90	1.41	0.71	1.105	0.905	1.28	0.78
20	5.10	6.35	6.95	1.36	0.73	1.905	0.915	1.25	0.80
21	5.30	6.45	7.00	1.32	0.76	1.085	0.920	1.22	0.82

22	5.50	6.50	7.00	1.27	0.79	1.080	0.925	1.18	0.85
23	5.70	6.60	7.05	1.24	0.81	1.075	0.935	1.16	0.86
24	5.90	6.65	7.10	1.20	0.83	1.070	0.940	1.13	0.89
25	6.10	6.70	7.15	1.17	0.85	1.065	0.940	1.10	0.91

Service Forester's Handbook