How much concrete for a 50×50 slab 6 inches thick?
Answer
46.30 cubic yards
1737 bags of 80lb concrete mix2778 bags of 60lb mixOrder ready-mix delivery (~$6,945)Add 10% for waste = 50.93 cy
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How We Calculated This
Cubic yards = (L × W × D/12) / 27
(50 × 50 × 6/12) / 27 = 1250.00 / 27 = 46.30 cubic yards
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Calculated using verified formulas. Last updated March 2026.