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Topsoil for 100 sq ft
Topsoil for 100 ft² at 4 in deep · 45 × 0.75 ft³ bag
Topsoil for 100 ft² by depth
| Depth | yd³ | ft³ | Bags | Tons | Bulk / bagged cost |
|---|---|---|---|---|---|
| 2 in | 0.62 | 16.7 | 23 | 0.68 | $22 / $80 |
| 4 in | 1.23 | 33.3 | 45 | 1.36 | $43 / $158 |
| 6 in | 1.85 | 50.0 | 67 | 2.04 | $65 / $234 |
| 8 in | 2.47 | 66.7 | 89 | 2.72 | $86 / $312 |
Use 2 in to top-dress a lawn, 4–6 in for new lawns and 6–12 in for raised or new garden beds. Loose topsoil settles about 10–20%.
How it is calculated
Volume = area × depth: 100 ft² × (4 ÷ 12) ft = 33.3 ft³; ÷ 27 = 1.23 yd³. 100 ft² is, for example, a 10.0 × 10.0 ft square or a 10 × 10 ft strip.
FAQ
How much topsoil do I need for 100 square feet?
At 4 in deep, 100 ft² needs 1.23 cubic yards (33.3 ft³) – about 45 × 0.75 ft³ bag. That weighs roughly 1.4 tons.
Is it cheaper to buy topsoil in bulk or bags for 100 sq ft?
At typical prices ($35/yd³ bulk vs $3.50 per bag) bulk costs about $43 versus $158 in bags, before delivery. Bulk delivery usually wins above about 1 cubic yard.
Other areas: 25 ft² · 50 ft² · 75 ft² · 120 ft² · 150 ft² · 200 ft² · all areas · topsoil calculator
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