How much concrete for a 6×12 slab 6 inches thick?
Answer
1.33 cubic yards
50 bags of 80lb concrete mix80 bags of 60lb mix~$200 for ready-mix
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How We Calculated This
Cubic yards = (L × W × D/12) / 27
(12 × 6 × 6/12) / 27 = 36.00 / 27 = 1.33 cubic yards
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Calculated using verified formulas. Last updated March 2026.