Log Weight Calculator - Huber's formula

Log Length:

Smallest Diameter (Ds):

Largest Diameter (D1):

Wood Type:

Calculation Mode:

Quantity:

Stack Width:

Stack Height:

Single Log Volume (m³):

Single Log Weight (kg):

1. What is a Log Weight Calculator?

Definition: A log weight calculator estimates the weight of logs based on their dimensions and wood type, either for a specific quantity or a stack.

Purpose: This tool aids in logistics, equipment planning, and construction by calculating the green weight of logs.

2. How Does the Calculator Work?

The calculator uses these formulas:

$$ \text{Single Volume (m}^3\text{)} = \frac{\pi \times \text{Length}}{3} \times (r_s^2 + r_s \times r_l + r_l^2) $$ $$ \text{Single Weight (kg)} = \text{Single Volume} \times \text{Density (kg/m}^3\text{)} $$ $$ \text{Total Weight (kg)} = \text{Single Weight} \times \text{Quantity} \quad (\text{for Quantity mode}) $$ $$ \text{Stack Quantity} = \left\lfloor \frac{\text{Stack Width} \times \text{Stack Height}}{\pi \times \left(\frac{D_s + D_l}{4}\right)^2} \right\rfloor $$ $$ \text{Total Weight (kg)} = \text{Single Weight} \times \text{Stack Quantity} \quad (\text{for Stack mode}) $$

Explanation: It calculates a single log’s volume as a frustum of a cone using smallest (Ds) and largest (D1) diameters, multiplies by green density, and then computes total weight based on quantity or stack size. Units are converted to meters.

3. Wood Types and Densities

Details: Green densities vary by species, e.g., Alder, Red (736 kg/m³), Ash, White (769 kg/m³), Oak, Live (1217 kg/m³), Pine, White (577 kg/m³), and more. See the dropdown for a full list of 58 common species.

4. Preparing for Log Handling

Tips: Measure length and both diameters accurately, choose quantity or stack mode, select the wood type, and use the total weight to plan transport and equipment needs.

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