Sawmill Yield Calculator

Estimate board feet yield from a log using Doyle, Scribner, and International 1/4" rules. Enter log diameter, length, and taper.

Inputs

Small-End Diameter

Log Length

Taper

in/ft

Tab to move between fields

Results

Doyle Rule BF

108 BF

Scribner Rule BF124.7 BF

International Rule BF139.6 BF

Large-End Diameter28 in

Est. Recovery Rate28.4%

How to Use This Calculator

Enter Small-End Diameter, Log Length, and Taper.
Review the Doyle Rule BF result.
Use Scribner Rule BF and International Rule BF to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Small-End Diameter

Small-End Diameter	Doyle Rule BF
10	27 BF
21	216.8 BF
33	630.8 BF
44	1,200 BF

What each input means

Small-End Diameter: Log diameter inside bark at the small end
Log Length: Length of the log in feet
Taper: Diameter increase per foot of length (typically 0.5-2 in/ft)

How this is calculated

Worked example, using the default values

Identify Input Parameters
Small-End Diameter = 16, Log Length = 12, Taper = 1 = 3 input(s) provided
Calculate Doyle Rule BF
Doyle Rule BF
108 = 108
Calculate Scribner Rule BF
Scribner Rule BF
124.7 = 124.7
Calculate International Rule BF
International Rule BF
139.6 = 139.6

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Calculate board feet from lumber dimensions. Enter thickness, width, length, and quantity to determine total board footage for your woodworking project.

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