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• Understanding hardwood grades
• Easy board foot calculation

Easy board foot calculation

Easy board foot calculation Hardwoods sell in grades by the board foot, a basic unit of measurement that equals a 1"-thick board that's 12" wide and 12" long. That's because hardwoods -- unlike softwoods -- aren't cut and milled as dressed, sized lumber in standard nominal dimensions (2X4, 1X6, 4X4, etc.) to only be cut to length for construction. Instead, mills saw hardwoods into random widths and lengths to best take advantage of the clear wood in a log. Hardwoods do come in nominal thicknesses, such as 1", 1-1/4", etc. (often referred to as four-quarter, five-quarter, and so on), that actually are a bit shy of the stated thickness. Therefore, you'll pay for a 1"-thick measurement but actually be getting about 3/16" less. Board widths aren't standardized. Typically, the dealer will "round up" to the next inch of width and charge you for it. To help you in estimating stock and cost for the projects you want to build, the chart below gives you the amount of board feet in a range of common hardwood dimensions you'll likely come across where you shop for wood.

BOARD FOOT CALCULATOR

1"-THICK LUMBER
		LENGTH
		6'	8'	10'	12'	14'	16'
W I D T H	3"	1.5	2	2.5	3	3.5	4
	4"	2	2.66	3.33	4	4.66	5.33
	6"	3	4	5	6	7	8
	8"	4	5.33	6.66	8	9.33	10.66
	10"	5	6.66	8.33	10	11.66	13.33
	12"	6	8	10	12	14	16

1-1/4"-THICK LUMBER
		LENGTH
		6'	8'	10'	12'	14'	16'
W I D T H	4"	2.5	3.33	4.16	5	5.83	6.66
	6"	3.75	5	6.25	7.5	8.75	10
	8"	5	6.66	8.33	10	11.66	13.33
	10"	6.25	8.33	10.41	12.5	14.58	16.66
	12"	7.5	10	12.5	15	17.5	20

2"-THICK LUMBER
		LENGTH
		6'	8'	10'	12'	14'	16'
W I D T H	6"	6	8	10	12	14	16
	8"	8	10.66	13.33	16	18.66	21.33
	10"	10	13.33	16.66	20	23.33	26.66
	12"	12	16	20	24	28	32

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