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Concrete for a 16 × 16 slab
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3.16 yd³
16 × 16 ft (256 ft²) at 4 in thick, before waste
Concrete for a 16 × 16 slab by thickness
| Thickness | yd³ | yd³ +10% | 80 lb bags | 60 lb bags | Ready-mix @ $165/yd³ |
|---|---|---|---|---|---|
| 4 in | 3.16 | 3.48 | 157 | 209 | $574 |
| 5 in | 3.95 | 4.35 | 196 | 261 | $717 |
| 6 in | 4.74 | 5.21 | 235 | 313 | $860 |
| 8 in | 6.32 | 6.95 | 313 | 418 | $1,147 |
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 16x16 slab?
A 16 × 16 ft slab 4 in thick is 3.16 cubic yards; order about 3.48 yd³ with 10% extra. At 6 in thick it is 4.74 yd³.
How many bags of concrete for a 16x16 slab?
About 157 bags of 80 lb concrete (or 209 × 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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