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Concrete for a 24 × 30 slab
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8.89 yd³
24 × 30 ft (720 ft²) at 4 in thick, before waste
Concrete for a 24 × 30 slab by thickness
| Thickness | yd³ | yd³ +10% | 80 lb bags | 60 lb bags | Ready-mix @ $165/yd³ |
|---|---|---|---|---|---|
| 4 in | 8.89 | 9.78 | 440 | 587 | $1,613 |
| 5 in | 11.11 | 12.22 | 550 | 734 | $2,017 |
| 6 in | 13.33 | 14.67 | 661 | 881 | $2,420 |
| 8 in | 17.78 | 19.56 | 880 | 1174 | $3,227 |
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 24x30 slab?
A 24 × 30 ft slab 4 in thick is 8.89 cubic yards; order about 9.78 yd³ with 10% extra. At 6 in thick it is 13.33 yd³.
How many bags of concrete for a 24x30 slab?
About 440 bags of 80 lb concrete (or 587 × 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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