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Lumber Dimension Conversions

Convert nominal lumber sizes to actual dimensions in inches and mm.
Covers 2x4, 2x6, 4x4, and other common framing and decking sizes with board feet.

Lumber Dimensions Converter

Look up actual versus nominal lumber dimensions for 1x2 through 6x6. A 2x4 is actually 1.5 in x 3.5 in after drying and milling — with mm equivalents.
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