Logging
Early Log Rule
This rule appeared about the same time as the Doyle log rule, and its results are identical to those of the Doyle log rule.
- measure the diameter on the small end of the log in inches
- subtract 4 inches from the diameter
- multiply this amount by half of the remainder
- multiply this result by the length of the log in feet
- divide the previous amount by 8
- the result in board feet
An Early Log Rule Calculator
Calculator
- enter the small end diameter of the log
- the length of the log in feet
Result
- the volume of the log in board feet
Example Calculation:
The diameter measured at the small end of the log is 24 inches, and the log is 20 feet long
24 - 4 = 20 20 * 10 = 200 200 * 20 = 4000 4000 ÷ 8 = 500
The log contains 500 board feet
Board Foot Log Rule Calculators
- Brereton Log Rule - Imperial Measurements
- Blodgett Foot Rule
- Doyle Log Rule
- Early Log Rule
- International 1/8-inch Log Rule
- International 1/4-inch Log Rule
- International 1/4-inch Log Rule (Grosenbaugh)
- International 1/8-inch and 1/4-inch Log Rules
- Roy Log Rule
- Ontario Log Rule
- Scribner Log Rule
- Scribner Log Rule: Board Foot Volume of a Tree
- Scribner Decimal C
- Comparing Results from Various Board Feet Log Rules