Board Foot Calculator
Board Foot Calculator
Calculate the volume and cost of lumber with this easy-to-use board foot calculator. A board foot equals 144 cubic inches (1ft × 1ft × 1in).
Input Measurements
The total number of lumber pieces you want to calculate
The length of the lumber in feet
The width of the lumber in inches
The thickness of the lumber in inches
The cost per board foot in dollars
Calculation Formula
board feet = length (ft) × width (in) × thickness (in) / 12
Results
8.33 BF per piece
8' × 10" × 1.25"
Total Board Feet
8.33 BF
1 piece
Total Cost
$34.57
at $4.15/board foot
Common Equivalents
Volume in cubic inches:
1199.52 in³
Volume in cubic feet:
0.69 ft³
Information & FAQs
What is a Board Foot?
A board foot is a unit of volume equal to 144 cubic inches, commonly used in the United States and Canada to measure lumber. It is equivalent to a piece of wood measuring 1 foot × 1 foot × 1 inch (1/12 cubic foot).
Frequently Asked Questions
How do you calculate the board feet in a log?
To calculate board feet in a log, you can use a Doyle rule or International ¼-inch rule table. Measure the diameter at the shorter end (inches) and the length (feet). Then use the appropriate table or the equation: ((Diameter - 4)/4)² × Length.
How do you measure a board foot?
To measure a board foot, multiply the length (in feet), width (in inches), and thickness (in inches) of the lumber, then divide by 12.
How many board feet are in a 2x4?
The board feet in a 2x4 depend on the length: 6 ft: 4 BF, 8 ft: 5⅓ BF, 10 ft: 6⅔ BF, 12 ft: 8 BF, 16 ft: 10⅔ BF.
What is the difference between a board foot and a linear foot?
A board foot measures volume (144 cubic inches), while a linear foot only measures length (12 inches).
What is board foot insulation?
Board foot insulation measures spray foam insulation volume coverage (1 ft × 1 ft × 1 in).
How much does a board foot of oak weigh?
A board foot of oak weighs between 3.08-4.67 lb (1.42-2.12 kg), with an average of 3.875 lb (1.77 kg).
How many board feet in 320 square feet?
There's no direct conversion as they measure different things (volume vs. area). For 320 sq ft at 1 inch depth, you would have 320 board feet.
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