About this chart
A quick chart of cubic yards of concrete for common slab sizes at 4, 5, and 6 inch thicknesses.
Every value is calculated with the same formulas as the calculators on this site. You can print the page or save it as a PDF for the job site.
Concrete needed by slab size
| Slab size | 4 in thick | 5 in thick | 6 in thick |
|---|---|---|---|
| 8 by 8 ft | 0.79 | 0.99 | 1.19 |
| 10 by 10 ft | 1.23 | 1.54 | 1.85 |
| 10 by 12 ft | 1.48 | 1.85 | 2.22 |
| 12 by 12 ft | 1.78 | 2.22 | 2.67 |
| 12 by 16 ft | 2.37 | 2.96 | 3.56 |
| 14 by 14 ft | 2.42 | 3.02 | 3.63 |
| 16 by 16 ft | 3.16 | 3.95 | 4.74 |
| 16 by 20 ft | 3.95 | 4.94 | 5.93 |
| 20 by 20 ft | 4.94 | 6.17 | 7.41 |
| 20 by 24 ft | 5.93 | 7.41 | 8.89 |
| 24 by 24 ft | 7.11 | 8.89 | 10.67 |
| 30 by 40 ft | 14.81 | 18.52 | 22.22 |
Open any size for a full table with bags and weight. Add 5 to 10 percent extra when you order.
Frequently asked questions
What is the concrete slab size chart?
A quick chart of cubic yards of concrete for common slab sizes at 4, 5, and 6 inch thicknesses.
Are the values exact?
The volume math is exact. Weights and bag yields are planning values, so confirm with your supplier.
Can I print this chart?
Yes. The page prints cleanly, or you can save it as a PDF.
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