Bags or a truck?
At this size a ready-mix truck is the sensible choice. Mixing 56 bags by hand is a long, heavy day, and the first batches start to set before the last ones are placed.
Concrete slab charts · 10 × 10 ft
How much concrete for a 10×10 slab?
A 10 × 10 ft slab 4 inches thick needs 1.23 cubic yards of concrete (33.3 cubic feet), or about 56 bags of 80 lb premix. Add 5–10% for waste. Other thicknesses are in the table, or adjust the calculator below.
Units
10 × 10 ft slab by thickness
Exact volumes without waste. Bag counts are rounded up.
| Thickness | Cubic yards | Cubic feet | 80 lb bags | 60 lb bags | Metric |
|---|---|---|---|---|---|
| 3 in | 0.93 yd³ | 25.0 ft³ | 42 | 56 | 0.71 m³ |
| 4 in | 1.23 yd³ | 33.3 ft³ | 56 | 75 | 0.94 m³ |
| 5 in | 1.54 yd³ | 41.7 ft³ | 70 | 93 | 1.18 m³ |
| 6 in | 1.85 yd³ | 50.0 ft³ | 84 | 112 | 1.42 m³ |