Calculate the area of the paving project, and thus the area requiring sand. For rectangular areas of paving, the area is the length multiplied by the width. For right-angle triangles, multiply the height by half the base. For example, the surface area of a patio 10 feet long by 6 feet wide is 10*6, or 60 square feet.
Calculate the volume of sand by multiplying the surface area by the depth of the sand layer. The recommended depth of sand for laying pavers is 1 inch. As one inch is 1/12 of a foot, divide the surface area, in square feet, by 12 to find the cubic feet of sand required. For example, a 60-square-foot patio requires 5 cubic feet of sand because 60/12 = 5.
Convert cubic feet to cubic yards for large volumes of sand. Divide the cubic feet value by 27 to convert it to cubic yards. A cubic yard of sand will cover 324 square feet to a depth of 1 inch.