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Concrete for a 24 × 36 slab
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10.67 yd³
24 × 36 ft (864 ft²) at 4 in thick, before waste
Concrete for a 24 × 36 slab by thickness
| Thickness | yd³ | yd³ +10% | 80 lb bags | 60 lb bags | Ready-mix @ $165/yd³ |
|---|---|---|---|---|---|
| 4 in | 10.67 | 11.73 | 528 | 704 | $1,936 |
| 5 in | 13.33 | 14.67 | 661 | 881 | $2,420 |
| 6 in | 16.00 | 17.60 | 793 | 1056 | $2,904 |
| 8 in | 21.33 | 23.47 | 1056 | 1408 | $3,872 |
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 24x36 slab?
A 24 × 36 ft slab 4 in thick is 10.67 cubic yards; order about 11.73 yd³ with 10% extra. At 6 in thick it is 16.00 yd³.
How many bags of concrete for a 24x36 slab?
About 528 bags of 80 lb concrete (or 704 × 60 lb) at 4 in thick including 10% extra. For this size, ready-mix delivery is usually more practical than bags.
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