Log Volume Calculator (Doyle/Scribner)

Log Volume Calculator (Doyle/Scribner). Board feet (BF) is the standard unit for measuring usable lumber in a log, and the Log Volume Calculator estimates how much you'll get using three industry-standard scaling methods. Enter your log diameter (small end, inside bark), log length, and number of logs, then select a log scale method — Doyle, Scribner, or International — to see your total log volume in board feet. Secondary outputs include volume per log and the scale method applied. Also try the calculate Land Use Change Emissions.

Results

Total Log Volume

Volume per Log

Scale Method

What is the difference between Doyle, Scribner, and International log scales?

Doyle scale tends to underestimate volume, especially for smaller logs. Scribner scale is more accurate for logs 12-40 inches in diameter. International scale is considered the most accurate across all log sizes and is widely used internationally. See also our Tree Age Calculator.

Should I measure diameter inside or outside the bark?

Always measure the small end diameter inside the bark (DIB). This is the standard measurement used by all major log rules as it represents the actual usable wood volume.

How do I measure log length correctly?

Measure to the last full foot - do not round up. For example, a log that is 15 feet 8 inches should be entered as 15 feet. Hardwood logs especially follow this rule strictly.

What does BF mean in the results?

BF stands for Board Feet, which is the standard unit for measuring lumber volume. One board foot equals a piece of wood 12 inches × 12 inches × 1 inch thick.

Which log scale should I use for my region?

Doyle scale is common in the Eastern US, Scribner is popular in the Western US, and International scale is used globally. Check with local mills or foresters for regional preferences.

Why do different scales give different volumes for the same log?

Each scale uses different formulas and assumptions about waste, kerf loss, and lumber recovery. This results in varying estimates, which is why it's important to know which scale your buyer uses.

Can I calculate volume for logs smaller than 6 inches?

Most log scales are designed for sawlogs typically 8 inches and larger. Smaller logs are usually measured by different methods as they're often used for pulpwood or other products.

How accurate are these log volume calculations?

These calculations provide estimates based on standard formulas. Actual lumber yield can vary due to log defects, sawing methods, kerf width, and individual log characteristics. You might also find our use the Urban Tree Canopy Calculator useful.