How much concrete for a 4×16 slab 4 inches thick?
Answer
0.79 cubic yards
30 bags of 80lb concrete mix48 bags of 60lb mix~$119 for ready-mix
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How We Calculated This
Cubic yards = (L × W × D/12) / 27
(16 × 4 × 4/12) / 27 = 21.33 / 27 = 0.79 cubic yards
Related Calculations
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Calculated using verified formulas. Last updated March 2026.