Concrete for a 12×24 Slab at 6" Thick
A 12 ft × 24 ft slab poured 6 inches thick is 288 sq ft and needs 5.33 cubic yards of concrete — order 5.76 CY to cover 8% waste, or about 260 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.