Raised Bed Soil Calculator
Calculate the exact amount of soil needed for raised garden beds.
Supports rectangular, L-shaped, and multiple bed configurations.
Soil Needed
Raised bed soil volume is calculated from the bed’s length, width, and depth.
Imperial formula:
Volume (cu ft) = Length (ft) × Width (ft) × Depth (in) / 12
Cubic Yards = Cubic Feet / 27
Metric formula:
Volume (m³) = Length (m) × Width (m) × Depth (cm) / 100
Liters = Cubic Meters × 1,000
Recommended soil mix for raised beds:
- 60% topsoil
- 30% compost
- 10% perlite or vermiculite (for drainage)
Common raised bed sizes:
| Size (imperial) | Size (metric) | Depth 12 in / 30 cm |
|---|---|---|
| 4 × 4 ft | 1.2 × 1.2 m | 16 cu ft / 0.43 m³ |
| 4 × 8 ft | 1.2 × 2.4 m | 32 cu ft / 0.86 m³ |
| 3 × 6 ft | 0.9 × 1.8 m | 18 cu ft / 0.49 m³ |
Buying guide (imperial):
- 1 cubic yard = 27 cubic feet
- Standard bag = 1 or 2 cubic feet
Buying guide (metric):
- Standard bag = 25 or 50 liters