Planning result
A 12x12 patio with a 4 inch compacted base needs about 1.78 cubic yards before allowance and about 2.04 cubic yards with 15% allowance. A separate 1 inch bedding sand layer is about 0.44 cubic yards before allowance.
Assumptions
| Patio size | 12 ft by 12 ft. |
|---|---|
| Base depth | 4 inches of compactable base. |
| Sand depth | 1 inch bedding sand layer. |
| Allowance | 15% added to base gravel for compaction planning. |
Calculation
| Step | Result | Formula |
|---|---|---|
| Patio area | 144 sq ft | 12 x 12 |
| Base volume | 48 cubic ft | 144 x 0.333 |
| Base cubic yards | 1.78 yd3 | 48 / 27 |
| Base with allowance | 2.04 yd3 | 1.78 x 1.15 |
| Sand volume | 12 cubic ft | 144 x 0.083 |
| Sand cubic yards | 0.44 yd3 | 12 / 27 |
Base and sand are separate
Paver base and bedding sand are different materials. Keep them as separate shopping lines so delivery and installation stay clear.
Depth depends on conditions
Soil, drainage, climate, and traffic can change base depth. This example is a planning calculation, not a design requirement.
Next step
Use the linked calculator or planning hub to adjust dimensions, waste, coverage, depth, spacing, or product packaging for the real project.
Related guides
FAQ
How much paver base for a 12x12 patio?
This example gives about 2.04 cubic yards of base gravel with 15% allowance.
How much bedding sand for a 12x12 patio?
A 1 inch layer is about 0.44 cubic yards before allowance.
Can I use decorative gravel as paver base?
Usually no. Paver base should be a compactable aggregate.