Calculate the board footage of lumber for your woodworking projects. Add multiple boards and estimate total cost.
13" two-speed planer with extra knives and infeed/outfeed tables. Essential for milling rough lumber to final thickness.
View on AmazonPrecision board foot rule for quickly calculating lumber volume at the yard. Aluminum construction lasts forever.
View on AmazonClassic 16-foot tape with easy-read blade markings. Perfect for measuring lumber dimensions at the lumberyard.
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Essential tools for measuring and marking lumber accurately.
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Board feet = (Thickness in inches × Width in inches × Length in feet) ÷ 12. For example, a board that's 1" thick, 6" wide, and 8' long = (1 × 6 × 8) ÷ 12 = 4 board feet.
Lumber thickness is often expressed in quarters of an inch. 4/4 (four-quarter) means 4 quarters or 1 inch thick rough. After surfacing (S2S), it's typically about 13/16" or 0.8" thick. 8/4 is 2 inches rough, about 1.75" surfaced.
Rough lumber is cheaper per board foot and gives you more control over final thickness. However, you need a jointer and planer. Surfaced lumber (S2S or S4S) costs more but is ready to use. For beginners or those without surfacing equipment, S4S is convenient.
Plan for 15-20% extra for waste, defects, and cutting errors. For complex projects with many angled cuts, consider 25-30% extra. It's always better to have leftover wood than to run short mid-project.