表土计算器
免费表土用量计算器：按长、宽、厚度估算立方码。
结果
4建议购买立方码
- 3.89精确立方码
- 100立方英尺
计算原理
Volume (cu ft) = length × width × (depth ÷ 12). Divide by 27 for cubic yards, then round up.
计算示例
Example: 20 ft × 10 ft bed at 6 in → 100 cu ft ≈ 3.7 cu yd, so buy 4 cubic yards.
Typical topsoil depth
New lawns often need 4–6 inches of quality topsoil. Garden beds may use 6–12 inches depending on existing soil. Screened topsoil packs differently than fill dirt.
Bags vs bulk
Bulk delivery by the cubic yard is usually cheaper for anything over a few bags. Confirm whether your quote is loose or compacted volume.
Uneven grades
If the yard slopes, take an average depth or split the area into zones. Order a little extra for settling after watering.
常见问题
How much topsoil for a new lawn?
Many installs use about 4–6 inches over the prepared grade. Measure length × width × depth, then convert to cubic yards with this calculator.
Is topsoil the same as fill dirt?
No. Topsoil is richer growing medium; fill dirt is cheaper structural fill. Use the right product for planting beds.
Should I order extra?
Yes—settling and uneven spots eat volume. Rounding up a yard is common for medium beds.
结果仅为估算。购买前请核对覆盖率与当地要求。不能替代专业建议。