Log Volume Calculator

Last updated: 04 Jan 2025 | Author: Brij | Review By: Irshad

Share on :

Log Volume Calculator tool for calculating the volume of logs quickly and accurately. Whether you're working in forestry, timber sales, or simply managing your own wood resources, this calculator will help you determine the volume of logs with ease.

Enter Log size

Diameter:

Length:

Number of logs:

Log Scale:

Doyle

Scribner

Total Board Feet:

There are several methods to calculate log volume, each with its own formula and approach. The most common and popular methods are:

Doyle Formula
Scribner Rule

Doyle Formula

$The Doyle log rule is a common method used to estimate the volume of lumber that can be sawn from a log. The Doyle rule tends to underestimate log volumes for smaller logs and overestimate for larger ones. Here's the formula and method to calculate the log volume using the Doyle log rule:$

$Board Feet = {(\frac{D - 4}{4})}^{2} \times L$

Where:

𝐷 is the diameter of the log in inches (measured at the small end, inside the bark).
𝐿 is the length of the log in feet.

Steps to Calculate Log Volume using Doyle Rule

Measure the Diameter: Measure the diameter (D) of the log at the small end, inside the bark, in inches.
Measure the Length: Measure the length (L) of the log in feet.
Apply the Formula: Plug the values of D and L into the Doyle formula.

Example Calculation

Suppose you have a log with a diameter of 16 inches and a length of 12 feet:

Diameter (D): 16 inches
Length (L): 12 feet

Calculation:

$Board Feet = {(\frac{16 - 4}{4})}^{2} \times 12$

$Board Feet = {(\frac{12}{4})}^{2} \times 12$

$Board Feet = {(3)}^{2} \times 12$

$Board Feet = 9 \times 12$

$Board Feet = 108$

So, the log volume is estimated to be 108 board feet using the Doyle log rule.

Scribner log rule

The Scribner rule is typically represented by a set of tables, but it can also be estimated with the following formula

$v = \frac{(0.79 D^{2} - 2 D - 4) L}{16}$

Where:

𝐷 is the diameter of the log in inches (measured at the small end, inside the bark).
𝐿 is the length of the log in feet.

Example Calculation

Suppose you have a log with a diameter of 16 inches and a length of 12 feet:

Diameter (D): 16 inches
Length (L): 12 feet

Calculation:

Board Feet = (((0.79 x 16 x 16) - (2 x 16) - 4) x 12 ) / 16

Board Feet = ((202.24 - 32 - 4) x 12 ) / 16

Board Feet = (166.24 x 12 ) /16

Board Feet = 1994.88 / 16

Board Feet = 124.68

Check out 1 similar Log Volume Calculator :

Log Volume Calculator

Help Improve This Calculator

Your suggestions help us make better tools for everyone.