Sand cubic yards, tons & bags — area × depth ÷ 324, ~1.35 tons and 54 bags per cubic yard

What this diagram shows

A conversion diagram turning area and depth into a sand order in three units. The volume formula is cubic yards equals area in square feet times depth in inches divided by 324, where 324 is 12 inches per foot times 27 cubic feet per cubic yard, folding inch depth straight into yards. An isometric cube shows one cubic yard as 3 by 3 by 3 feet, or 27 cubic feet. Two arrows convert it: at a dry planning density of about 2,700 pounds per cubic yard, one cubic yard is about 1.35 tons; and because the standard retail sand bag is 0.5 cubic feet, one cubic yard equals 54 bags, drawn as a stack. A table shows coverage falling as depth grows: one cubic yard covers 324 square feet at 1 inch, 162 at 2 inches, 108 at 3 inches, and 81 at 4 inches. Wet sand runs 15 to 25 percent heavier than the dry planning weight.