How much concrete for a 14×18 slab 6 inches thick?
Answer
4.67 cubic yards
176 bags of 80lb concrete mix280 bags of 60lb mixOrder ready-mix delivery (~$701)Add 10% for waste = 5.14 cy
Need a custom calculation?
Open the full calculator with custom inputs
How We Calculated This
Cubic yards = (L × W × D/12) / 27
(18 × 14 × 6/12) / 27 = 126.00 / 27 = 4.67 cubic yards
Related Calculations
How much concrete for a 4×4 slab 4 inches thick?0.20 cubic yardsHow much concrete for a 4×4 slab 6 inches thick?0.30 cubic yardsHow much concrete for a 4×4 slab 8 inches thick?0.40 cubic yardsHow much concrete for a 4×6 slab 4 inches thick?0.30 cubic yardsHow much concrete for a 4×6 slab 6 inches thick?0.44 cubic yards
Calculated using verified formulas. Last updated March 2026.