Total Board Feet
723 BF
Per Log
145 BF
Usable
398 BF
Value
$2,531
Total Board Feet
723
Per Log
145
Usable
398
Yield
55%
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Inputs
Result
International rule for 16" x 12': ~102 BF per log. 5 logs = 510 BF. At 55% yield = 281 BF usable. White Oak at $3.50/BF = $1,785 gross.
Inputs
Result
Doyle: (20-4)² × 10 / 16 = 160 BF per log. 10 logs = 1,600 BF. Black Walnut at $8/BF = $12,800 gross value.
Board feet are calculated using log scaling rules based on the small-end diameter inside bark and the log length. The three main rules are Doyle, Scribner, and International 1/4-inch. Doyle is the most conservative and commonly used for hardwoods in the eastern US. International is the most accurate for all log sizes.
| Rule | Best For | Accuracy |
|---|---|---|
| Doyle | Hardwood trade | Underestimates small logs |
| Scribner | Pacific NW softwoods | Moderate accuracy |
| International | All sizes | Most accurate |
Lumber yield ranges from 48% to 65% depending on species, log quality, and sawing method. Softwoods like Douglas Fir yield 60–65% due to fewer defects, while hardwoods like Black Walnut yield 45–50% due to knots and irregular grain. Sawmill efficiency also matters.
Timber value varies enormously by species. Black Walnut is the most valuable at $6–$12 per board foot for veneer-quality logs. White Oak ranges $2.50–$5/BF, while White Pine is $1–$2/BF. Value depends on log diameter, length, and grade.
Most sawmills require a minimum small-end diameter of 6–8 inches for commercial lumber. Logs under 10 inches are considered low-grade and yield mostly 2x4 and pallet lumber. High-value furniture lumber typically requires 14-inch or larger diameter logs.
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Last Updated: Mar 20, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.