Coverage Charts - Ponds, Pavers, Rock, Landscaping, Retaining .Converting Inches to Tenths of Feet . of a Trapezoid. trapezoid. The area of a trapezoid is found by first finding the average length of the parallel sides (A + B) / 2, then multiplying the result times the height (h). . Length x Width x Depth Divided by 27 = Cubic Yards x 1.35 = Tonnage x 1.33 = Compacted Tons. LENGTH X.conversion chart cubic feet to tons of 2 inch wash stone,Convert volume to weight: Stone, crushed - Aqua-Calccarat, 1 895.07, ounce, 13.37. gram, 379.01, pound, 0.84. kilogram, 0.38, tonne, 0. milligram, 379 014.36. Density. Stone, crushed weigh(s) 1.6 gram per (cubic centimeter) or 0.93 ounce per (cubic inch). show all units. volume v = w ⁄ ρ. centimeter³, 236.59, oil barrel, 0. foot³, 0.01, US cup, 1. Imperial gallon, 0.05, US fluid.