- 1). Determine the exposed width. For example, a floorboard that will have an exposed width of 3 inches would be converted to 1/4 feet. Use a tape measure if you need to.
- 2). Convert this width to feet. For example, the 3 inches is 1/4 feet.
- 3). Divide the lineal price (price per length, in feet) by the number of feet the width is. For example, a floorboard that's $5 per lineal foot and 1/4 feet wide has a cost per surface area of $5/(1/4)=$20/foot-square.
- 1). Determine the exposed area of the unit. For example, a shingle may be 6 inches by 8 inches, but only 6 inches by 6 inches will be exposed when the shingles are layered on the roof.
- 2). Convert the measurements to feet and multiply. For example, the 6 inches by 8 inches becomes 1/2 feet times 3/4 feet, which is 3/8 feet squared.
- 3). Divide the price per unit by the exposed area. For example, if the price is $0.20 per shingle and the area is 3/8 square feet per shingle, the square feet price is .2 times 8/3, or $0.533 per square foot. Use a calculator, if you need to.
To Convert Lineal Feet
To Convert Price Per Unit
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