Board Feet Lumber Calculator
Construction & DIYCalculate total lumber board feet (FBM), piece counts, and total hardwood cost from lumber thickness, width, and length for woodworking and carpentry projects.
Total board feet · estimated cost 360
About this calculator
Hardwood lumber is sold by the "board foot" (a volume of wood equivalent to a 1-inch thick by 12-inch wide by 1-foot long board), rather than linear feet.
This calculator takes board thickness (in inches or quarters like 4/4, 8/4), width in inches, length in feet or inches, and piece quantity to compute exact board footage and total lumber cost.
How It Works & Formula
Board Feet = (Thickness in inches × Width in inches × Length in inches) / 144, or (Thickness in inches × Width in inches × Length in feet) / 12. Total Cost = Board Feet × Price per Board Foot.
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