Board Foot International 1/4-inch Log Rule (Clark) Calculator

Definition

This calculator uses various formulas to calculate the board foot based on the diameter and length of the log.

It can calculate the board foot for the following lengths:

• 4 feet
• 8 feet
• 12 feet
• 16 feet
• 20 feet

Steps to calculate the board foot:

1. Enter the diameter of the log in inches.
2. Select the length of the log in feet.
3. Click "Calculate" to see the results.

Note: All values are rounded to the nearest multiple of 5 board feet. Lengths over 20 feet are to be scaled as two or more logs.