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The 'board-foot' is a specialized unit of volume for measuring lumber in the United States and Canada. It is the volume of a one foot length of a board one foot wide and one inch of nominal thickness.
Board-foot is abbreviated FBM (for "foot, board measure"). The unit MFBM represents a thousand board-feet.
In Australia and New Zealand the term 'super foot' or 'superficial foot' is used to mean the same.[1]
One board-foot equals:

★ 1 ft × 1 ft × 1 in

★ 12 in × 12 in × 1 in

★ 144 in³

★ 1⁄12 ft³

★ 2360 cc

★ 2.360 liters

★ 0.002360 cubic meters or steres
Board-feet are used for rough lumber (before drying and planing) with no adjustments.
For planed lumber, board-feet refer to the nominal thickness and width of lumber, calculated in principle on its size before drying and planing. Actual length is used.
See dimensional lumber for a full discussion of the relationship of actual and nominal dimensions. Briefly, for softwoods, to convert nominal to actual, subtract ¼ inch for dimensions under 2 inches; subtract ½ inch for dimensions under 8 inches; and subtract ¾ inch for larger measurements. The system is more complicated for hardwoods.

Contents

References

References

How Many? A Dictionary of Units of Measurement © Russ Rowlett and the University of North Carolina at Chapel Hill

★ Board Foot Calculator