Board Foot Calculator
Calculate board feet from lumber dimensions. A board foot is a standard unit of measurement for hardwood lumber.
Enter dimensions.
Board Foot Formula
Board Feet = (Thickness″ × Width″ × Length′) ÷ 12
One board foot = a piece of wood 1 inch thick, 12 inches wide, and 1 foot long (= 144 cubic inches).
Common Board Foot Values
| Nominal Size | BF per foot of length |
|---|---|
| 1×4 | 0.333 |
| 1×6 | 0.5 |
| 1×8 | 0.667 |
| 1×12 | 1.0 |
| 2×4 | 0.667 |
| 2×6 | 1.0 |
| 2×12 | 2.0 |
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Last updated: 2026-08-08