Weight of Wood Calculator
Calculate the weight of lumber and logs across tree species in pounds and kilograms for kiln-dried versus green wood.
= 831.6 kg (41.67 Cubic Feet)
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What Is a Weight of Wood Calculator?
A weight of wood calculator computes the total mass of lumber, timber, or timber logs in pounds (lbs) and kilograms (kg). Because wood cellular density and moisture content vary substantially between species and drying conditions, this tool references empirical USDA Forest Products Laboratory density data.
How to Use This Calculator
- Select the wood species (Red Oak, White Oak, Douglas Fir, Southern Pine, Maple, Walnut, Cedar, or White Pine).
- Select moisture condition: Kiln Dried (~12% MC) or Green / Wet (fresh cut).
- Enter the total lumber volume in Board Feet (or calculate volume from dimensions).
- Read the total weight in pounds and kilograms.
Wood Weight Equation
\text{Weight (lbs)} = \left(\frac{\text{Board Feet}}{12}\right) \times \rho_{\text{species}}Where 12 Board Feet equals 1 cubic foot, and ρ_species is species density in lbs/cu ft from the USDA Wood Handbook.
Worked Example
Scenario: Transporting 400 Board Feet of kiln-dried Red Oak in a half-ton pickup truck.
Volume: 400 BF ÷ 12 = 33.33 cubic feet.
Red Oak kiln-dried density: 44 lbs/cu ft.
Calculate weight: 33.33 × 44 = 1,466.7 lbs.
Compare to green weight: 33.33 × 63 lbs = 2,100 lbs (633 lbs heavier).
Tips & Key Notes
- Freshly cut green logs contain up to 50% to 100% moisture by dry weight and weigh 40% to 70% more than seasoned lumber.
- When hauling lumber in a pickup truck or utility trailer, always check the vehicle's payload capacity rating (GVWR).
- Softwoods like Western Red Cedar (23 lbs/cu ft) weigh half as much as dense hardwoods like White Oak (47 lbs/cu ft).
Frequently Asked Questions
How much does a 2x4 weigh?
A standard 8-foot kiln-dried 2x4 (SPF or Douglas Fir) weighs approximately 9 to 11 pounds. A pressure-treated 2x4 weighs about 14 to 17 pounds due to retained chemical preservative.
What is the heaviest common North American wood?
Live Oak (Quercus virginiana) and Osage Orange (Maclura pomifera) are the densest, weighing approximately 55 to 60 lbs per cubic foot kiln-dried (over 70 lbs green).
Why does green wood weigh so much more than dry wood?
Living trees contain sap and free water stored inside the open hollow lumen of wood cells. Kiln drying evaporates this free and bound water until moisture content drops to 8–12%.
How much does a pallet of 2x4 lumber weigh?
A full bundle (unit) of 208 eight-foot 2x4s weighs approximately 2,000 to 2,400 pounds.
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