How it works
Cubic feet = Length × Width × (Depth ÷ 12). A standard bag of garden soil holds about 1.5 cubic feet.
Example
A 4 × 4 ft bed 9 in deep needs 12 cubic feet — about 8 bags.
Raised Bed Soil Calculator
Work out how much soil you need to fill a raised garden bed — in cubic feet, cubic yards and standard bags.
- Free
- No sign-up
- Instant results
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Frequently asked questions
- What soil mix for a raised bed?
- A common mix is roughly 60% topsoil, 30% compost and 10% aeration (e.g. perlite). Buy a little extra — soil settles after watering.