My Log Board Foot Calculator: Measure Timber with PrecisionPost Title

If you're in the lumber industry or frequently deal with logs, you’ve probably come across the term log board foot. Estimating the board feet in a log helps determine its value and the amount of usable lumber it will yield. However, calculating it manually can be tricky, which is why using a Log Board Foot Calculator is the best way to get accurate results quickly.

In this guide, we’ll cover everything you need to know about log board foot measurements and how a calculator can simplify the process.

What is a Log Board Foot?

A log board foot is a measurement of the volume of lumber that can be milled from a log. Unlike standard board foot calculations for planks, log board foot measurements account for the log’s diameter, length, and milling inefficiencies.

Log Board Foot Formula

There are different methods for estimating board feet in a log. The most common formulas are based on log rules, including Doyle, Scribner, and International 1/4-Inch rules. The general formula follows this structure:

However, most professionals rely on log rules for more accurate calculations.

Common Log Rules for Board Foot Calculation

1. Doyle Rule – Best for large logs; accounts for sawmill waste.
2. Scribner Rule – Good for logs with minimal taper.
3. International 1/4-Inch Rule – The most accurate, considering saw blade thickness and kerf loss.

Each of these rules gives slightly different board foot estimates for the same log.