Woodshop 101: How to Calculate a Board Foot

Woodshop 101: How to Calculate a Board Foot

The standard measurement of lumber is board feet. According to the National Hardwood Lumber Association, one board foot is 12" wide by 12" long and 1" thick (144 cubic inches) or the equivalent.

Board feet is calculated by multiplying the surface measure by the standard thickness, except that standard thicknesses less than 1" are measured as 1". In surfaced lumber, board footage is measured before surfacing (learn more about surface smoothness here).


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