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Concrete for a 8 × 12 slab
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1.19 yd³
8 × 12 ft (96 ft²) at 4 in thick, before waste
Concrete for a 8 × 12 slab by thickness
| Thickness | yd³ | yd³ +10% | 80 lb bags | 60 lb bags | Ready-mix @ $165/yd³ |
|---|---|---|---|---|---|
| 4 in | 1.19 | 1.30 | 59 | 79 | $215 |
| 5 in | 1.48 | 1.63 | 74 | 98 | $269 |
| 6 in | 1.78 | 1.96 | 89 | 118 | $323 |
| 8 in | 2.37 | 2.61 | 118 | 157 | $430 |
Bags include 10% extra. Ready-mix prices vary by region; small loads often carry a short-load fee.
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FAQ
How much concrete do I need for a 8x12 slab?
A 8 × 12 ft slab 4 in thick is 1.19 cubic yards; order about 1.30 yd³ with 10% extra. At 6 in thick it is 1.78 yd³.
How many bags of concrete for a 8x12 slab?
About 59 bags of 80 lb concrete (or 79 × 60 lb) at 4 in thick including 10% extra. For this size, ready-mix delivery is usually more practical than bags.
Other slab sizes
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