Calculate board feet from lumber thickness, width, length, and quantity. Use this board foot calculator to estimate lumber volume, waste allowance, cubic feet, lumber weight, price per board foot, and total project cost.
Dimension method:
The calculator converts thickness and width to inches, length to feet, then applies the board foot formula.
Known board feet:
Enter an existing board foot amount to estimate waste, cubic feet, weight, and cost.
Cost estimate:
The calculator multiplies board feet with waste by price per board foot, then adds delivery or handling fees.
Weight estimate:
The calculator converts board feet to cubic feet and multiplies by estimated wood weight per cubic foot.
A board foot calculator helps estimate how much lumber you need and what it may cost before buying, cutting, hauling, or ordering wood.
It can be useful for sawmills, lumber yards, woodworking, hardwood projects, furniture building, shelving, cabins, decks, fencing, and rough lumber planning.
Your result shows board feet before waste, board feet with waste, cubic feet, cubic inches, cubic meters, estimated lumber weight, lumber cost, delivery fee, and total cost. These are estimates based on the dimensions, quantity, lumber type, waste allowance, and price you enter.
Multiply thickness in inches by width in inches by length in feet, then divide by 12. Multiply by the number of boards for the total board feet.
One board foot is 144 cubic inches of wood, equal to a board 12 inches long, 12 inches wide, and 1 inch thick.
One cubic foot equals 12 board feet because one cubic foot contains 1,728 cubic inches and one board foot contains 144 cubic inches.
Use actual measured dimensions when possible. Nominal lumber sizes, such as 2×4, are usually smaller after drying and surfacing.