Board Foot Calculator

Calculate board foot calculator for construction and building projects.

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Updated January 2025
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Board Foot Calculator

Calculate lumber volume

How to Calculate Board Feet

A board foot is a unit of volume for lumber, equal to a piece of wood 12 inches long, 12 inches wide, and 1 inch thick (144 cubic inches). The formula is:

(Thickness (in) × Width (in) × Length (ft)) / 12