Calculate the weight of lumber and logs across tree species in pounds and kilograms for kiln-dried versus green wood.
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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.
\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.
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).
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.
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).
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%.
A full bundle (unit) of 208 eight-foot 2x4s weighs approximately 2,000 to 2,400 pounds.
Calculate lumber board feet (BF), linear footage, cubic volume, and material costs for woodworking, milling, and carpentry.
Calculate seasoned vs green firewood weight, million BTU heat content, and heating oil equivalents for cords of firewood.
Calculate density (ρ = m/V), mass, or volume across metric and imperial units with instant multi-unit conversions.
= 831.6 kg (41.67 Cubic Feet)