You need about
8.15 cubic yards of topsoil
8.96tons (typical)
220.0cubic feet
order bulkbags would be impractical
Includes 10% extra for waste. Weight assumes about 1.1 tons per cubic yard (range 0.9–1.25).
The working
20 ft × 30 ft × 4/12 ft = 200.0 cubic feet. Add 10% = 220.0 cubic feet. Divide by 27 = 8.15 cubic yards.
Change the numbers
–cubic yards
–tons (typical)
–cubic feet
–bags
What if it is a different depth?
| Depth | Cubic yards | Tons | Bags |
|---|---|---|---|
| 2 in | 4.07 | 4.48 | order bulk |
| 3 in | 6.11 | 6.72 | order bulk |
| 4 in (this page) | 8.15 | 8.96 | order bulk |
| 6 in | 12.22 | 13.44 | order bulk |
What you will also need for topsoil
Tools and supplies that go with this job. These are Amazon search links, so you can compare options and current prices there.
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Good to know
Spread topsoil 4 in at the very least and 4–6 in for a new lawn. For a raised bed, 12 in is a safe default fill depth, and deep-rooted vegetables can need more. Soil settles, so a little extra is normal.