Concrete for a 24 × 24 Garage floor at 4″
A 24 × 24 ft garage floor poured 4 inches thick needs about 7.82 cubic yards (≈ 5.98 m³) of concrete (including a 10% waste buffer) — roughly 352 bags of 80 lb mix, weighing about 15.84 tons. A standard garage floor slab is poured 4 inches thick.
This is over ~1 cubic yard — it fits in one ready-mix truck (~10 cu yd each). Ready-mix delivery is usually cheaper than mixing 352 bags by hand.
Adjust the numbers
Pre-filled for a 24 × 24 ft slab — change anything to match your project.
A flat, solid pad of concrete — a patio, shed floor, walkway, or driveway. Measure how long and how wide it is, and how thick to pour it (4 inches is typical).
Bag & ready-mix counts include your 10% waste buffer.
Estimate only. These figures help you plan how much to buy — they are not engineering or structural advice. Actual needs vary with site conditions, waste, and installation method, so order a little extra and confirm final quantities with your supplier or contractor before you buy or start the job.
Other garage floor sizes
Frequently asked questions
How much concrete do I need for a 24x24 garage floor?
A 24 × 24 ft garage floor at 4 inches thick contains 192 cubic feet of concrete — about 7.11 cubic yards. With a 10% waste buffer, order 7.82 cubic yards.
How many bags of concrete for a 24x24 garage floor at 4 inches?
Roughly 352 bags of 80 lb mix, 470 bags of 60 lb, or 704 bags of 40 lb (including 10% waste). At this size, ready-mix delivery is usually cheaper and easier than mixing bags.
How much does the concrete for a 24x24 garage floor weigh?
About 15.84 tons (31,680 lb) of wet concrete.
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