How much concrete for a 25×50 slab 5 inches thick?
Answer
19.29 cubic yards
724 bags of 80lb concrete mix1158 bags of 60lb mixOrder ready-mix delivery (~$2,894)Add 10% for waste = 21.22 cy
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How We Calculated This
Cubic yards = (L × W × D/12) / 27
(50 × 25 × 5/12) / 27 = 520.83 / 27 = 19.29 cubic yards
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Calculated using verified formulas. Last updated March 2026.