How do you convert square feet and depth in inches to cubic yards?
Multiply your area in square feet by the depth in feet (depth in inches divided by 12) to get cubic feet, then divide by 27 (since 1 cubic yard = 3 ft × 3 ft × 3 ft = 27 cubic feet). Formula: Cubic Yards = (Length ft × Width ft × (Depth in ÷ 12)) ÷ 27.