Worked example: 4 inches deep
| Step | Math | Result |
|---|---|---|
| Area | about 125 ft × 80 ft | 10,000 sq ft |
| Volume at 4 in | 10,000 × 4 ÷ 12 | 3,333.3 ft³ |
| Add 10% for settling | 3,333.3 × 1.10 | 3,666.7 ft³ |
| Cubic yards | 3,666.7 ÷ 27 | 135.80 yd³ |
| Tons | 135.80 × 1.1 | 149.38 tons |
| 0.75 ft³ bags (40 lb) | 3,666.7 ÷ 0.75 | 4889 bags |
| 1.5 ft³ bags | 3,666.7 ÷ 1.5 | 2445 bags |
Topsoil by depth
| Depth | Cubic feet | Cubic yards (+10%) | Tons | Bulk order (yd³) | Delivered | 0.75 ft³ bags |
|---|---|---|---|---|---|---|
| 1 in | 833.3 | 33.95 | 37.35 | 34.0 | $1,265 | 1223 |
| 2 in | 1,666.7 | 67.90 | 74.69 | 68.0 | $2,455 | 2445 |
| 4 in | 3,333.3 | 135.80 | 149.38 | 136.0 | $4,835 | 4889 |
| 6 in | 5,000.0 | 203.70 | 224.07 | 204.0 | $7,215 | 7334 |
Bulk delivery is cheaper at 4 inches: $15,889 in 0.75 ft³ bags versus $4,835 delivered. A cubic yard of topsoil weighs about 1.1 tons dry and more when wet, so check your truck or trailer limit.
Prices used: 0.75 ft³ bag $3.25, 1.5 ft³ bag $6.50; bulk topsoil $35/yd³ plus $75 delivery (1 yd³ minimum).
Spread by depth: 1/2 inch at a time for top-dressing living grass, 2 inches to level, 4–6 inches to build a new lawn. The lawn is approximated as a rectangle; use a different shape in the calculator if yours is not.
Nearby sizes
Also see 5,000 sq ft lawn , 10,890 sq ft lawn , 2,000 sq ft lawn, or the topsoil size chart. Open the topsoil calculator to change the size.