How much concrete for a 10×15 slab 5 inches thick?
Answer
2.31 cubic yards
87 bags of 80lb concrete mix139 bags of 60lb mix~$347 for ready-mix
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How We Calculated This
Cubic yards = (L × W × D/12) / 27
(15 × 10 × 5/12) / 27 = 62.50 / 27 = 2.31 cubic yards
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Calculated using verified formulas. Last updated March 2026.