Soil Calculator

Estimates the volume of soil needed for a garden bed or planter.

Lilu Baba's Soil Calculator works out how much topsoil or potting mix to buy based on your bed or planter's dimensions.

How to use this calculator

  1. Enter the garden bed or planter's length and width.
  2. Enter your desired soil depth.
  3. Soil volume needed updates instantly.
Soil Volume Needed (m³) —
Approx. Weight (tonnes) —

Soil Calculator — frequently asked questions

Typically 20-30cm for most vegetables, though root vegetables may need deeper soil — check specific plant requirements.

Yes — soil typically settles somewhat after watering, so buying a little extra is common practice.