Yardage Calculator Home / Yardage Calculator Calculator Length: Feet Width: Feet Depth: Value (from Depth Key Code) Cubic Yards Depth Key Code Inches = Value 1" = 12.00 2" = 6.00 3" = 4.00 4" = 3.00 5" = 2.40 6" = 2.00 7" = 1.71 8" = 1.50 9" = 1.33 10" = 1.20 11" = 1.09 12" = 1.00 13" = 0.92 14" = 0.86 15" = 0.80 16" = 0.75 17" = 0.71 18" = 0.67 19" = 0.63 20" = 0.60 21" = 0.57 22" = 0.55 23" = 0.52 24" = 0.50