Concrete for a 24×24 Slab at 4" Thick
A 24 ft × 24 ft slab poured 4 inches thick is 576 sq ft and needs 7.11 cubic yards of concrete — order 7.68 CY to cover 8% waste, or about 346 80-lb bags for a small pour. Adjust the dimensions below for your project.
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Want the full guide — tools, step-by-step, common mistakes and FAQ? See the Concrete Slab Calculator.