Question: how do i calculate how much gravel i need for my driveway?
Answer: Measure the length and width of your driveway in feet. Multiply the length by the width to get surface area and divide the result by three because 4 inches is 1/3 of a foot. You now have the volume of gravel needed in cubic feet. Divide the volume in cubic feet by 27 because there are 27 cubic feet in a cubic yard.