Quickly and easily calculate the number of concrete or cement bags needed to do a concrete or cement job. Especially useful for pre-mix and ready mix bags calculations. You can calculate the number of 10lb, 20lb, 40lb, 60lb and 80lb concrete or cement bags needed. You can input the concrete or cement quantity in cubic inches, cubic centimeters, cubic feet, cubic yards or cubic meters. You can also calculate the cost for the number of concrete or cement bags needed too.