Get cubic yards, bags and ready-mix truck loads for slabs, footings and driveways.
Tip: add 5–10% extra for spillage and uneven subgrade.
Includes your waste factor. Bag counts rounded up to whole bags.
Volume = length × width × thickness, converted to cubic yards (÷ 27). We then convert to bags using standard yields — 0.45 ft³ per 60 lb bag and 0.60 ft³ per 80 lb bag — and to truck loads at 10 yd³ per ready-mix truck.
Bagged mix, ready-mix and tools from trusted suppliers and local pros.
A 10×10 ft slab at 4 inches thick needs about 1.23 cubic yards (33.3 ft³) — roughly 74 sixty-pound bags or 56 eighty-pound bags.
45 eighty-pound bags make one cubic yard. Each bag yields 0.60 ft³ and a yard is 27 ft³.
80 lb bags are cheaper per yard and mean fewer bags on big pours. 60 lb bags are lighter and easier for small or solo jobs.
4″ for sidewalks and patios, 4–6″ for driveways and garage floors, 6–8″ for heavy vehicles, 8–12″ for foundations.
Ready-mix is cheaper and more consistent above ~1 cubic yard. Bags suit small or phased jobs.