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Soil Volume Calculator

Estimate soil or compost volume for beds, planters and raised beds.

Try an example:
Compost and soil can settle. Consider buying a little extra for levelling and topping up.

Notes and next steps

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How it works

Estimate soil, compost or growing-medium volume for beds, raised planters and containers.

Estimating method: Base area = length × width. Volume = base area × depth. Litres = cubic metres × 1000.

Worked example

A 2 m × 1 m bed at 300 mm deep has a base area of 2 m² and a volume of 0.6 m³, or 600 litres.

Common mistakes
  • Entering depth in metres when the field expects millimetres.
  • Forgetting soil can settle after filling.
  • Not allowing for existing soil level, drainage material or uneven beds.
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