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Basalt Rock

Volume Calculator

Use our simple calculator to work out exactly how much mulch, soil, sand, pebbles or any of our bulk loads you will need.

Use our chart to work out the depth you will need.


Add an additional garden area to the total volume

Suggested Depths

  • Mulch
  • New mulch — 10cm
  • Topping up — 7cm
  • Soil
  • New garden bed — 20cm
  • Topping up — 5cm
  • Aggregate
  • Foot traffic — 7cm
  • Light vehicles — 10cm
  • Heavy vehicles — 15cm
Volume Calculator

Basalt (volcanic) Rock also know as honeycomb rock, moss rock and Colac rock– Varying shapes and sizes.