You enter the thickness (inches), width (inches), length (feet), quantity, and optional price per board foot. The tool computes board feet per piece as (thickness × width × length) / 12, multiplies by the number of pieces, and then multiplies by price to estimate cost. It assumes nominal dimensions — actual milled lumber is typically slightly smaller than the stated size.
A board foot is a unit of volume equal to 144 cubic inches — picture a board that is 1 inch thick, 12 inches wide, and 1 foot long. Hardwood lumber is almost always priced per board foot.
Use the nominal (stated) dimensions when ordering from a supplier, since that is how lumber is sold. Actual dimensions after surfacing are typically ¼″ to ½″ smaller in each direction.
A common rule of thumb is to add 10–15% to your calculated board footage to account for defects, saw kerf, and off-cuts. Complex projects with many angled cuts may need more.
Not directly. Board feet are an imperial measure. If you have metric dimensions, convert centimeters to inches (÷ 2.54) and meters to feet (÷ 0.3048) before entering them.
Hardwoods like walnut and cherry cost significantly more per board foot than softwoods like pine or poplar because they grow more slowly and are in higher demand for furniture and cabinetry.
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.