What is a board foot of lumber?

A board foot (BF) is a unit of lumber volume equal to 1 inch thick x 12 inches wide x 12 inches long = 144 cubic inches. Formula: BF = (thickness in inches x width in inches x length in feet) / 12. A 2x4 that is 8 feet long = (2 x 4 x 8) / 12 = 5.33 BF.

How do I calculate how much lumber I need?

Calculate the board feet for each piece: BF = thickness(in) x width(in) x length(ft) / 12. Sum all pieces. Add 10-15% for waste and mistakes. For framing lumber, count the number of standard pieces (2x4x8, etc.) needed for your project.

What is the difference between nominal and actual lumber dimensions?

Lumber dimensions are nominal (rough-sawn size) but actual (finished size) is smaller. A 2x4 actually measures 1.5 in x 3.5 in. A 2x6 is 1.5 in x 5.5 in. A 4x4 is 3.5 in x 3.5 in. Nominal dimensions are used for board feet calculations; actual dimensions matter for structural calculations.

How do I convert cubic meters to board feet?

1 cubic meter = 423.776 board feet. 1 board foot = 0.002359 cubic meters. For large lumber purchases, this conversion is useful when comparing metric and imperial lumber volumes in international trade.

Lumber Volume Converter

Convert lumber and timber volume units: board feet (bf), cubic feet, cubic inches, cubic metres, cords, MBF (thousand board feet), and steres.

Lumber Volume Reference

Unit	Abbr.	Equals
Board Foot	bf	144 in³ = 1 ft × 1 ft × 1 in
MBF	MBF	1 000 board feet
Cubic Foot	ft³	12 board feet
Cord	cord	128 ft³ (4 ft × 4 ft × 8 ft stack)
Cord Foot		1/8 cord = 16 ft³
Stere	st	1 m³ ? 0.276 cord

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