Lumber Calculator
Estimate the amount of lumber needed for your construction or woodworking project. Calculate board feet and total cost with ease.
Input Dimensions
Calculation Results
How to Use the Lumber Calculator
Our lumber calculator is a versatile tool for woodworkers, contractors, and DIY enthusiasts. To calculate board feet, enter the length, width, and thickness of your boards.
If you're buying a large quantity, enter the price per board foot or per cubic meter for a total project cost estimate. Click "Calculate Now" to see the total volume and the projected cost for your lumber order.
Pro Tips for Woodworking and Building
Nominal vs. Actual Size
Remember that a "2x4" board isn't actually 2x4 inches. It's usually 1.5x3.5 inches. Always use the actual measured size in the calculator for the most accurate results.
Factor in Kerf Waste
When cutting boards, each saw cut removes a small amount of wood (the kerf). Add 5-10% to your total order to account for this lost material and potential mistakes.
Frequently Asked Questions
What is a board foot?
A board foot is a specialized unit of volume for lumber. It is equal to a board that is 12 inches long, 12 inches wide, and 1 inch thick (totaling 144 cubic inches of wood).
How do I calculate board feet for multiple boards?
Calculate the board feet for one board using the standard formula, then simply multiply by the total number of boards in your order. Our calculator handles the unit conversions for you.
Why is lumber sold by the board foot?
Board foot pricing provides a consistent way to value wood regardless of its specific width or length, which is particularly useful for hardwoods and rough-sawn timber where sizes vary.