Board Feet Formula:
From: | To: |
Definition: This calculator determines the volume of lumber in board feet based on the length, width, and thickness measurements.
Purpose: It helps woodworkers, carpenters, and lumber professionals quantify wood materials for projects and purchases.
The calculator uses the formula:
Where:
Explanation: The formula calculates how many 1-foot long, 1-inch thick, and 12-inch wide (1 board foot) units are in the given lumber piece.
Details: Board feet is the standard measurement for lumber in North America, allowing for accurate pricing, inventory management, and project planning.
Tips: Enter the length, width, and thickness in inches. All values must be > 0. The result shows how many board feet the piece contains.
Q1: Why divide by 144 in the formula?
A: 144 is the number of cubic inches in a board foot (12" × 12" × 1" = 144 cubic inches).
Q2: How do I measure lumber for this calculation?
A: Measure length in inches along the grain, width across the face (perpendicular to grain), and thickness through the board.
Q3: Does this work for metric measurements?
A: No, this is specifically for imperial measurements. Convert metric to inches first if needed.
Q4: How are fractional board feet handled?
A: The calculator provides decimal results which can be rounded to standard lumber fractions (e.g., 0.125 = 1/8).
Q5: What's a typical board thickness?
A: Common thicknesses are 1" (4/4), 1.5" (6/4), 2" (8/4), etc., though any thickness can be used in the calculation.