4.5 board feet to buy (incl. 15% waste)
Length comes in steps of your lumber thickness and width in steps of strip width — plan to trim the extra, or nudge those two inputs until the “actual” size lands where you want it.
Assumes 1/8″ kerf, 1/8″ planing allowance per slice, 1″ panel trim, rough stock 1/4″ over milled size. Multi-species patterns: buy the waste allowance in each species. Never run end grain through a thickness planer — drum sander or hand plane only.
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