Board Foot Formula:
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Definition: This calculator converts the volume of lumber in cubic inches to board feet, the standard measurement unit for lumber in North America.
Purpose: It helps woodworkers, carpenters, and lumber professionals accurately measure and price wood materials.
The calculator uses the formula:
Where:
Explanation: Dividing the volume by 144 converts cubic inches to board feet, since one board foot equals a 1-inch thick board that is 12 inches wide and 12 inches long (1 × 12 × 12 = 144 cubic inches).
Details: Accurate board foot calculations ensure proper material estimation, cost calculations, and project planning in woodworking and construction projects.
Tips: Enter the volume in cubic inches. The volume can be calculated by multiplying length × width × thickness (all in inches) of the lumber piece.
Q1: What exactly is a board foot?
A: A board foot is a volume measurement of lumber equal to 144 cubic inches, typically represented as a piece 1 inch thick, 12 inches wide, and 12 inches long.
Q2: How do I calculate volume for multiple pieces?
A: Calculate volume for one piece and multiply by the number of pieces, or sum the volumes of all pieces before converting to board feet.
Q3: Does thickness affect board foot calculation?
A: Yes, thicker boards contain more board feet per square foot of surface area. A 2-inch thick board contains twice as many board feet as a 1-inch thick board of the same length and width.
Q4: How is this different from linear feet?
A: Linear feet measures length only, while board feet measures volume, accounting for thickness and width as well as length.
Q5: Why is 144 the divisor?
A: Because 144 cubic inches equals one board foot (12" × 12" × 1" = 144 cubic inches).