Mulch & Topsoil Calculator
The volume of mulch or topsoil needed to cover an area to a depth.
Result
Volume (m³)
1.00
Volume (litres)
1,000
How it works
Volume = area × depth
Multiply the area by the depth to get the volume of mulch, soil or gravel needed. Buy a little extra for settling and uneven ground.
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Frequently asked questions
How deep should mulch be?
About 5–8 cm is typical for garden beds; less for delicate plants.
How many litres in a m³?
Exactly 1,000 litres — useful since bagged soil is often sold in litres.
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