Raised Bed Soil Calculator
Calculate how much soil mix you need to fill a raised garden bed.
Supports cubic feet and cubic meters.
Soil Needed
Raised Bed Soil Volume is calculated from the bed dimensions:
Imperial formula:
Cubic Feet = Length (ft) × Width (ft) × Depth (ft)
Cubic Yards = Cubic Feet / 27
Metric formula:
Cubic Meters = Length (m) × Width (m) × Depth (m)
Conversions:
- 1 cubic yard = 27 cubic feet = 0.7646 m³
- 1 cubic foot = 0.0283 m³
- A standard 1 cu ft bag of soil weighs ~40 lbs
Common raised bed sizes:
| Size (L×W×D) | Soil Needed |
|---|---|
| 4×4×1 ft | 16 cu ft (0.59 cu yd) |
| 4×8×1 ft | 32 cu ft (1.19 cu yd) |
| 4×8×1.5 ft | 48 cu ft (1.78 cu yd) |
Recommended soil mix (Mel’s Mix):
- 1/3 compost (blended)
- 1/3 peat moss or coconut coir
- 1/3 vermiculite