How much concrete for a 6×50 slab 5 inches thick?
Answer
4.63 cubic yards
174 bags of 80lb concrete mix278 bags of 60lb mixOrder ready-mix delivery (~$695)Add 10% for waste = 5.09 cy
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How We Calculated This
Cubic yards = (L × W × D/12) / 27
(50 × 6 × 5/12) / 27 = 125.00 / 27 = 4.63 cubic yards
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Calculated using verified formulas. Last updated March 2026.