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Log Weight Calculator

Recommended by arborists, this calculator helps you accurately determine the weight, volume, and other stack-related calculations for your log or board stock.

Wood Specifications:

Apple:

Smallest End d_s:

cm ▾

Length L:

cm ▾

Largest End d_l:

cm ▾

Stack Dimensions

Stack Width:

cm ▾

Stack Height:

cm ▾

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The log weight calculator helps determine the total weight of a log or board based on its species, dimensions, and moisture condition. It also calculates volume, stack capacity, and total estimated load weight for transportation or storage planning.

How to Use the Log Weight Calculator:

The calculator works for both Logs and Boards.

If You Select Log:

Choose the wood species from the dropdown menu
Enter the small-end and large-end diameters
Input the log length
For stacked logs, enter stack height and stack width

If You Select Board:

Select the board species
Enter board width, thickness, and length
Provide stack dimensions if calculating bulk quantity

Log Weight Calculation Formula:

The weight of a log is calculated using its volume and green density.

For a Cylindrical Log:

Weight = Density × Volume

Where:

Density = Green density (lb/ft³)
Volume = π × (D/2)² × Length

For a Tapered Log (Frustum Shape):

Volume = (π × Length / 12) × (D₁² + D₁D₂ + D₂²)

Weight = Volume × Density

D₁ = Small-end diameter
D₂ = Large-end diameter

Factors That Affect Log Weight:

Wood species
Moisture content (green vs. seasoned)
Log dimensions
Natural density of the wood

Freshly cut (green) logs are significantly heavier due to high moisture content. As wood dries, it becomes lighter. Average green densities typically range between 30 lb/ft³ and 75 lb/ft³, depending on species.

Sample Green Density Reference Table:

Species	Density (lb/ft³)	Species	Density (lb/ft³)
Red Oak	63	White Pine	36
Sugar Maple	56	Douglas Fir	39
Hickory	64	Western Red Cedar	28
Black Walnut	58	Yellow Poplar	38

Stacked Log Calculations:

To estimate the number of logs in a stack:

Calculate total stack volume (Height × Width × Length)
Divide by individual log volume
Multiply by density for total stack weight

Best Wood for Outdoor Applications:

Highly durable outdoor wood species include Teak, Ipe, Black Locust, and Redwood. These woods are naturally resistant to moisture, insects, and decay.

Example Calculation:

Find the weight of a 12 ft Red Oak log with a 16-inch diameter.

Step 1: Convert diameter to feet → 16 in = 1.33 ft

Step 2: Volume = π × (0.665)² × 12 ≈ 16.67 ft³

Step 3: Weight = 16.67 × 63 ≈ 1,050 lbs

This calculator simplifies heavy-duty forestry, woodworking, and transportation planning calculations.

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