This calculator is to be used as an estimating tool ONLY. Calculate the volume of total area by applying the appropriate formula. That means a 80-pound bag of concrete mix will yield 06 cubic feet of concrete a 60-pound bag will yield 045 cubic feet and a 40-pound bag yields 03 cubic feet.
Multiply the width times the length times the height W L H or use our volume calculator to find the cubic yardage.
Enter Height 4 ft or 48 in Enter Diameter 10 in. If you divide 393 cubic feet by 27 39327 146 cubic yards. You get 13 cu. Multiply the length by the width to determine square footage.