Agriculture & Forestry
Timber Standing Tree Board Feet Volume (Doyle Log Rule)
Calculate timber standing tree board feet volume (doyle log rule) using the stated engineering or scientific relationship and adjustable field inputs.
Preparing your result…
What this calculator does
Calculates Timber Standing Tree Board Feet Volume (Doyle Log Rule) using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Doyle board feet = (small-end inside-bark diameter − 4)² × log length ÷ 16
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Doyle log volume board feet=(small-end inside-bark diameter inches−4)²×log length ft/16.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • USDA report AppendixB,p.141 (PDFp.145). Replace diameter²/divisor: the 4-inch diameter deduction is essential. Inputs describe a log, not a whole standing tree. Require a suitable small-end diameter>4 in and a supported log length; whole-tree volume needs taper/log segmentation or a named DBH/height/form-class table.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Small-end diameter inside bark (in.) | Log length (ft) | Log volume (Doyle) |
|---|---|---|---|
| Worked example | 16 | 16 | 144 board feet |
| Half the amounts | 8 | 8 | 8 board feet |
| Double the amounts | 32 | 32 | 1,568 board feet |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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