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Convert log volume to board feet instantly with our Log to Board Foot Calculator. Get accurate lumber estimates using Doyle, Scribner, or Int’l 1/4 rule.
If you're working in the lumber industry, woodworking, or forestry, you need to know how many board feet can be obtained from a log. A Log to Board Foot Calculator helps you determine the exact board footage of a log based on its diameter and length. This tool is essential for sawmills, woodworkers, and timber buyers to estimate lumber yield efficiently.
A Log to Board Foot Calculator is a tool that calculates the board feet from a log by using a mathematical formula. The calculation depends on factors like the log's diameter, length, and the scaling method used (Doyle, Scribner, or International 1/4-Inch rule).
Board foot is a unit of measurement used to represent lumber volume, where:
1 Board Foot (BF) = 12 inches (L) × 12 inches (W) × 1 inch (T)
Using the Log to Board Foot Calculator is simple. Follow these steps:
The calculation varies depending on the rule used:
BF = ((D − 4)² × L) / 16
where:
BF = 0.79 × D² × L
International 1/4-Inch Rule Formula
BF = 0.905 × D² × L − 1.38 × D × L
A Log to Board Foot Calculator is an essential tool for accurately estimating lumber yield from logs. Whether you're a sawmill operator, woodworker, or timber buyer, this calculator helps you make informed decisions and avoid waste.
The International 1/4-Inch Rule is considered the most accurate because it accounts for kerf (saw blade width) and shrinkage.
The Doyle Scale underestimates small logs because it assumes a larger waste factor.
Yes, you can use it for both types, but some species may have different scaling rules.
The result is in board feet (BF), which is the standard measurement for lumber volume.