Calculate concrete volume for a slab or footing, in cubic yards and 80-pound bags.
Concrete Volume
— cubic yards
Plus 80-lb bag count.Usage Tip
Past roughly half a cubic yard, ordering ready-mix is usually cheaper and easier than mixing dozens of bags by hand.
THE MATH
cubic yards = (length × width × depth ÷ 12) ÷ 27
80-lb bags = cubic feet ÷ 0.6
80-lb bags = cubic feet ÷ 0.6
Concrete volume is the slab length times width times thickness, in cubic yards. An 80-pound bag of mix makes about 0.6 cubic feet.
Enter the slab length, width, and thickness.
The result gives cubic yards for ready-mix and the number of 80-pound bags.
The result gives cubic yards for ready-mix and the number of 80-pound bags.