Timber Yield Calculator
Enter tree diameter, merchantable height, and stand count to estimate total board-feet yield under Doyle, Scribner, and International 1/4" log rules.
Stand Parameters
Log Rules to Display
Enter stand parameters and click Calculate Yield to see results.
Board-Foot Yield by Log Rule
Per-log, per-tree, and stand totals
| Log Rule | BF / Log | BF / Tree | Stand Total (BF) |
|---|
Doyle: (D − 4)² × L / 16 — Simple; under-estimates small logs, over-estimates large ones.
Scribner: 0.79D² − 2D − 4, per 16-ft log — Tabular rule widely used in the US Pacific Northwest.
International 1/4": Iterative formula accounting for 1/4" saw-kerf taper — most accurate of the three.
BF = board feet. All estimates assume 16-ft log sections with 1" taper per 4-ft length (International rule only).
Summary
Enter tree diameter, merchantable height, and stand count to estimate total board-feet yield under Doyle, Scribner, and International 1/4" log rules.
How it works
- Enter the average diameter at breast height (DBH) in inches for the trees in the stand.
- Set the number of 16-foot log sections (bolts) per tree — this is the merchantable height divided by 16.
- Enter the total number of trees in the stand.
- Select which log rules to display (Doyle, Scribner, and/or International 1/4").
- The calculator applies each selected formula per log section, multiplies by the number of logs and trees, and shows per-tree and total stand board-feet.
- Use the results table to compare rule estimates and plan your timber sale or harvest.
Use cases
- Estimate board-foot volume before listing timber for sale.
- Compare Doyle, Scribner, and International 1/4" yields to choose the most favorable rule for negotiations.
- Plan a selective harvest by calculating yield for different DBH classes.
- Verify buyer cruise estimates against your own stand measurements.
- Help forestry students learn the differences between log-scaling rules.
- Quick cruising sanity-check during field work.