Board Footage Calculator

Calculate lumber volume in board feet for woodworking projects.

Required Inputs

Enter thickness, width, length and quantity

Thickness (in)

Examples: 4/4 = 1 in, 8/4 = 2 in, decimals allowed

Width (in)

Ex: 8 1/4 or 8.25

Length

Ex: 8 ft = 96 in

Quantity

Results

Board Foot and Total Board Feet

Board Feet (per piece)

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Total Board Feet

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What is a Board Foot?

A board foot equals 144 cubic inches of lumber (1 in × 12 in × 12 in). It is the standard unit for measuring lumber volume used by woodworkers and lumber suppliers.

Lumber Thickness Nomenclature

Common designations: 4/4 = 1 in, 5/4 = 1.25 in, 6/4 = 1.5 in, 8/4 = 2 in. Use the thickness input to accept either fractional formats (e.g., 4/4) or decimals.

Measuring Tips

Measure thickness at the thickest point.
For irregular widths, use average width.
Round lengths to the nearest inch for estimation.

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