$0.00
estimated lumber cost
Board Foot Calculator
Enter each board's thickness, width, length and quantity to get total board feet and what the lumber will cost. Accepts inches, feet (e.g. 8') or metric. Nothing is uploaded.
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Total board feet0
board feet
0
boards total
0
cubic feet
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board feet each
How board feet work
A board foot is 144 cubic inches of lumber — the volume of a piece 1" thick × 12" wide × 12" long. Hardwood is usually sold by the board foot, so this tells you how much material a project needs and what it will cost. Formula: (thickness × width × length in inches) ÷ 144, times quantity. Use the rough/nominal thickness you are billed for (e.g. 4/4 = 1").
What is a board foot?
A unit of lumber volume equal to 144 cubic inches — 1" thick, 12" wide, 12" long. Hardwood is typically priced per board foot.
How do you calculate board feet?
Multiply thickness × width × length (all in inches) and divide by 144. For length in feet, divide by 12 instead. Multiply by the number of boards.
Need a cutting plan too?
Use our free cut list optimizer to turn your parts into the fewest boards with the least waste.