Log Weight Calculator
Estimate the weight of a log based on its diameter, length, and wood species. Useful for forestry, logging, and woodworking.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Log Weight Calculator
- Enter Diameter (inches) – Type the log's diameter in inches (e.g., 12). Only positive numbers are accepted.
- Enter Length (feet) – Type the log's length in feet (e.g., 8). Must be a positive number.
- Select Wood Species – Choose the species from the dropdown. Each option shows its density in lbs/ft³ (e.g., Oak = 40 lbs/ft³).
- Click "Calculate Weight" – The estimated weight appears in pounds (lbs), rounded to one decimal.
- Review the result – The output shows the weight and a summary of your inputs. The formula used is displayed below for reference.
Note: All inputs must be in imperial units (inches for diameter, feet for length). The calculator uses the formula: Weight = (π × (Diameter/2)² × Length) / 144 × Density.
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Frequently Asked Questions
The calculator provides an estimate based on average wood densities. Actual weight may vary due to moisture content, species variations, and log shape.
Diameter is in inches, length in feet, and weight in pounds. The wood density is in lbs per cubic foot.
The densities used are for seasoned wood. Green wood can be significantly heavier. For best results, use species-specific green density values if available.