Landscaping
Layered Infill & Bioretention Calculator
Build an unlimited layered profile — rain garden, bioretention cell, raised bed, planter, or drain system. Get per-layer and total volume, tons, and truckloads.
Layered profile
Applied to every layer. Use quantity to model identical assemblies (e.g. 3 raised beds).
Number of identical assemblies (e.g. 3 raised beds).
Number of identical assemblies (e.g. 3 raised beds).
Number of identical assemblies (e.g. 3 raised beds).
Number of identical assemblies (e.g. 3 raised beds).
Live estimate
Total volume
7.1 cu yd
- Cubic feet
- 191.7 cu ft
- Tons (weighted layers)
- 7.82 tons
- Truckloads (10 cu yd)
- 0.71 loads
Per-layer breakdown
| Layer | Material | Cu yd | Tons |
|---|---|---|---|
| 1 | Drain rock | 1.85 | 2.59 |
| 2 | Sand | 0.62 | 0.83 |
| 3 | Topsoil | 3.70 | 4.07 |
| 4 | Mulch | 0.93 | 0.32 |
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Rain garden profile
Typical: 6–12″ drain rock, 2″ transition sand, 18–24″ engineered bioretention soil (60% sand / 20% topsoil / 20% compost), 2–3″ shredded hardwood mulch.
Raised bed profile
Bottom: 4–6″ coarse mulch or wood chips (Hügelkultur), then 8–12″ topsoil, then 3–4″ compost, capped with 2″ mulch.
Common mistake
Skipping the sand transition layer between drain rock and soil — fines wash into the drainage layer and clog it within a season.
Material assumptions
- Order matters: drainage layers go on the bottom, growing medium in the middle, mulch on top.
- A standard rain garden profile is 6–12″ drain rock, 2″ sand, 18–24″ bioretention soil mix, 2–3″ mulch.
- French drain: 3–4″ drain rock over fabric, 4″ perforated pipe, backfilled with drain rock, wrap fabric over the top.
Frequently asked questions
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These results are estimates only. Confirm quantities, compaction, waste, and delivery requirements with your supplier or project professional before ordering materials.