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Table 5.
Converting Sawtimber Volumes Measured in International 1/4 Inch Rule to Doyle Rule and Pulpwood Cubic Foot Volumes to Cords, by Forest Type

FOREST TYPE: PINE
Forest Product MBF International 1/4" Rule   Weighted Doyle Conversation Factor   MBF Doyle Rule   MBF Conversation   Growth in Board Feet   Ton Conversion Factor   Growth In Tons
Large Pine Sawtimber 203.21 x 0.60258 = 122.45 ÷ 1,000 = 0.12245 x 8.0000 = 0.9796
Hardwood Sawtimber 14.14 x 0.62036 = 8.77 ÷ 1,000 = 0.00877 x 9.0000 = 0.0789
      Cubic Feet   MBF International 1/4" Rule   Cord Conversation Factor   Growth in Cords   Ton Conversion Factor   Growth In Tons
Small Pine Sawtimber         111.08 ÷ 500 = 0.22216 x 2.6250 = 0.5832
Pine Pulpwood     30.65     ÷ 81 = 0.37840 x 2.5625 = 0.9697
Hardwood Pulpwood     3.30     ÷ 80 = 0.04125 x 2.8000 = 0.1155
FOREST TYPE: MIXED
Forest Product MBF International 1/4" Rule   Weighted Doyle Conversation Factor   MBF Doyle Rule   MBF Conversation   Growth in Board Feet   Ton Conversion Factor   Growth In Tons
Pine Sawtimber 138.78 x 0.60258 = 83.63 ÷ 1,000 = 0.08363 x 8.0000 = 0.6690
Hardwood Sawtimber 46.46 x 0.62036 = 28.82 ÷ 1,000 = 0.02882 x 9.0000 = 0.2594
      Cubic Feet   MBF International 1/4" Rule   Cord Conversation Factor   Growth in Cords   Ton Conversion Factor   Growth In Tons
Small Pine Sawtimber         63.46 ÷ 500 = 0.12692 x 2.6250 = 0.3332
Pine Pulpwood     10.31     ÷ 81 = 0.12728 x 2.5625 = 0.3262
Hardwood Pulpwood     7.08     ÷ 80 = 0.08850 x 2.8000 = 0.2478
                           
FOREST TYPE: HARDWOOD
Forest Product MBF International 1/4" Rule   Weighted Doyle Conversation Factor   MBF Doyle Rule   MBF Conversation   Growth in Board Feet   Ton Conversion Factor   Growth In Tons
Pine Sawtimber 41.86 x 0.60258 = 25.22 ÷ 1,000 = 0.02522 x 8.0000 = 0.2018
Hardwood Sawtimber 88.57 x 0.62036 = 54.95 ÷ 1,000 = 0.05495 x 9.0000 = 0.4946
      Cubic Feet   MBF International 1/4" Rule   Cord Conversation Factor   Growth in Cords   Ton Conversion Factor   Growth In Tons
Small Pine Sawtimber         19.50 ÷ 500 = 0.03900 x 2.6250 = 0.1024
Pine Pulpwood     2.31     ÷ 81 = 0.02852 x 2.5625 = 0.0731
Hardwood Pulpwood     11.37     ÷ 80 = 0.14213 x 2.8000 = 0.3980
Conversion Factors for International 1/4 Inch Log Rule to Doyle Log Rule from Mississippi State Study conducted by Thomas Matney
Conversion Factors for Doyle Log Rule to Tons from Texas Forest Service