How Many Bags of Concrete Do I Need for a 4×4 Slab?

In the busy construction realm of BuildTown, resourceful builder Sam dreamed of laying a sturdy 4×4 foot slab for his little project. He visited Construction Conjurer Lily, who explained that calculating concrete needs is like following a secret recipe. For a 4×4 slab, first determine the thickness (often 4 inches is common). Converting that into feet (4 inches is about 0.33 feet), the volume becomes:
4 ft×4 ft×0.33 ft≈5.28 cubicfeet4 \, ft \times 4 \, ft \times 0.33 \, ft \approx 5.28 \, cubic feet4ft×4ft×0.33ft≈5.28cubicfeet.
Experts from the Masonry Magicians say that one 60‑lb bag of concrete mix typically yields about 0.45 cubic feet of material. Dividing 5.28 cubic feet by 0.45 gives roughly 12 bags. Lily advised that it’s wise to add a little extra for waste, so about 13 bags should be safe. Sam learned that even simple projects require a bit of magical math to ensure the foundation is strong and true. And so, in BuildTown, every bag is a key ingredient in constructing a durable, dependable slab—a foundation upon which your future creations can stand firm.