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How much concrete for a 14×24 slab 8 inches thick?

Answer
8.30 cubic yards
312 bags of 80lb concrete mix498 bags of 60lb mixOrder ready-mix delivery (~$1,245)Add 10% for waste = 9.13 cy

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How We Calculated This

Cubic yards = (L × W × D/12) / 27

(24 × 14 × 8/12) / 27 = 224.00 / 27 = 8.30 cubic yards

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Calculated using verified formulas. Last updated March 2026.