Topsoil Calculator
Work out how much topsoil you need. Enter the area, the calculator returns the cubic metres for a typical spread depth, plus an indicative delivered cost.
How we estimate this
Topsoil is sold by the cubic metre. At a typical 100mm spread, one cubic metre covers about 10 square metres, so a 30m² area needs around 3 cubic metres. Garden beds at greater depth need proportionally more.
Pricing reviewed: November 2026.
Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding topsoils in Australia
Topsoil is sold by the cubic metre. At a typical 100mm spread, one cubic metre covers about 10 square metres, so a 30m² area needs around 3 cubic metres. Garden beds at greater depth need proportionally more.
Delivered topsoil is usually cheaper per cubic metre than bagged for anything beyond a small area. Confirm whether you want a garden mix, turf underlay or screened topsoil, they are priced differently.
Frequently asked questions
How much topsoil do I need?
At a 100mm spread, one cubic metre covers about 10 square metres, so a 30m² area needs roughly 3 cubic metres. Deeper garden beds need more. Enter your area for an estimate.
Is bagged or bulk topsoil cheaper?
Bulk delivered topsoil is usually much cheaper per cubic metre than bags for anything beyond a tiny area, though bags suit small top-ups where delivery is not worth it.
Are you a landscape supply yard?
Everyone on this page is working out what topsoil costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.