Calculate how much concrete you need for slabs, footings, and columns. Get results in cubic yards, cubic feet, and number of bags.
yd³ (with waste)
| Cubic Feet (no waste) | 33.33 ft³ |
| Cubic Yards (with waste) | 1.36 yd³ |
| Cubic Meters | 0.944 m³ |
| 60-lb Bags Needed | 62 bags |
| Estimated Weight | 5500 lbs |
Quick tip: For less than 1 yd³, use bags. For 1+ yd³, order ready-mix concrete.
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Slab: V = L × W × (D/12) (ft³)
Cu Yards = V ÷ 27 × (1 + waste%)
Bags: 60-lb = 45 bags/cu yd
Volume (cu ft) = length × width × thickness. Convert to cubic yards by dividing by 27. Add 10% waste.
60-lb bags: 45 bags per cu yd. 80-lb bags: 37 bags per cu yd. 40-lb bags: 56 bags per cu yd.
Foot traffic only: 4 inches. Driveways/light vehicles: 6 inches. Heavy loads: 8+ inches.
1 cubic yard of concrete weighs approximately 4,050 lbs (1,837 kg).
Calculations are for educational purposes only. Consult a qualified financial advisor for personalized advice.