🏗️ Construction

Board Foot Calculator

Calculate board feet of lumber from thickness, width, and length. Estimate cost per board foot and total price. Includes square feet to board feet conversion.

🪓 Lumber Board Foot Calculator
in
Nominal thickness (e.g., 2 for a 2×4)
in
Nominal width (e.g., 4 for a 2×4)
ft
$
Board Feet
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📋 Board Feet for Common Lumber Sizes

Lumber Size Board Feet @ $5/BF @ $8/BF
2×4×85.33 BF$26.67$42.67
2×4×106.67 BF$33.33$53.33
2×4×128.00 BF$40.00$64.00
2×6×88.00 BF$40.00$64.00
2×8×810.67 BF$53.33$85.33
2×10×813.33 BF$66.67$106.67
2×12×816.00 BF$80.00$128.00
4×4×810.67 BF$53.33$85.33

📖 How to Calculate Board Feet

A board foot is a unit of volume equal to a piece of wood 1 inch thick × 12 inches wide × 12 inches long (144 cubic inches).

Board Feet = (Thickness × Width × Length) ÷ 12
Where thickness and width are in inches, length is in feet

MBF — Thousand Board Feet

Lumber is often priced in MBF (thousand board feet). To convert: MBF = Board Feet ÷ 1000. A price of $500/MBF equals $0.50 per board foot.

Square Feet to Board Feet

To convert square feet to board feet, multiply by the thickness in inches: BF = Square Feet × Thickness (inches).