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Board Foot Calculator for Lumber

Calculate board feet from actual board thickness, width, length and quantity. Review the formula and keep nominal lumber names separate from dimensions.

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Understand the answer

The calculation, explained.

Board feet = thickness in inches × width in inches × length in feet ÷ 12 × board count. Actual dimensions and nominal lumber names are different things.

Review the example assumptions and results
Actual thickness
2 in
Actual width
6 in
Length
8 ft
Board count
1
Board feet
8
How this tool works

Adjust the labeled inputs to see a new calculation. Units and assumptions are shown beside each field. Printed and copied results use the same calculation.

This is a planning estimate, not a structural design, permit document or binding quote. Check product specifications and actual site measurements.

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