For 1,000 square feet, every inch of topsoil depth requires about 3.09 cubic yards before allowance. Choosing the correct finished depth is therefore more important than rounding the final order.
Topsoil quantities by depth
| Depth | Theoretical volume |
|---|---|
| 1 inch | 3.09 cubic yards |
| 2 inches | 6.17 cubic yards |
| 3 inches | 9.26 cubic yards |
| 4 inches | 12.35 cubic yards |
| 6 inches | 18.52 cubic yards |
Add allowance deliberately
Uneven ground, grading and settlement may justify extra material. At three inches, adding 10% changes 9.26 yards to about 10.19 yards. Discuss finished depth and settlement with the supplier.
Match depth to the use
Topdressing an established lawn, starting a new lawn and filling a planting bed are different projects. Review how deep topsoil should be before ordering.
Calculate topsoil for your exact area →
Verify the project specification
Local conditions, product requirements and project rules can change the final quantity or installation method. For additional background, consult USDA Web Soil Survey, along with the selected manufacturer and local authority.
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