Wood weight calculator

Volume and density determine the estimate

The tool converts rectangular dimensions to cubic feet, then multiplies by density. One board entered as 1 × 12 in × 1 ft has a volume of 1/12 cubic foot. Twelve of those boards occupy one cubic foot. At a density of 47 lb/ft³, that set weighs approximately 47 lb.

For four 1 × 6 in × 8 ft boards, the total volume is 1.3333 ft³. With the white-oak reference, the estimate is about 62.67 lb. The tool preserves full internal precision and rounds the display.

Moisture and species matter

A dried reference density is not an estimate of freshly cut wood. Moisture, growth conditions and the actual piece can change density. Even woods sold under a broad common name may represent different species. This release uses three explicitly named references rather than pretending that one “pine” value covers every pine.

Use a custom density when you have a suitable measured or supplier value. If you know a representative sample’s mass and volume, divide weight by volume in consistent units. Do not reuse a value measured at another moisture condition without assessing the difference.

A sensitivity check, not a guaranteed range

The ±10% display shows how much the answer changes if the chosen density is 10% lower or higher. It is an illustration, not a statistical confidence interval or a promise that the actual board falls inside the range.

Use actual measured thickness and width. This tool estimates solid wood only; it does not model plywood, MDF, voids, hardware, finishes or packaging. Confirm real weight when a transport or equipment limit depends on it.

Sources and reference scope

Reference data checked November 7, 2026. Reference average dried densities: white oak 47, black walnut 38, eastern white pine 25 lb/ft³, at about 12% moisture. These are not green-wood densities.

• The Wood Database · white oak
• The Wood Database · black walnut
• The Wood Database · eastern white pine