Skip to content
Calculator Tools
Gardening Calculators

Mulch Calculator

Mulch needed for beds and borders, in cubic metres, bags and tonnes.

Enter values

Results update as you type.

Result

Mulch needed

1.875 m³

Keep mulch clear of plant stems and tree trunks — piling it against them causes rot.

In litres
1,875
Weight
656 kg
In tonnes
0.656
70 litre bags
27
Bulk bags (0.7 m³)
3
Coverage per m³
13.3 m²
Cost
$75.00

About the Mulch Calculator

Mulch needed for beds and borders, in cubic metres, bags and tonnes.

Also known as: bark chip calculator, how much mulch, wood chip calculator, mulch coverage.

How to use this calculator

  1. Enter area to mulch, depth, material, price per m³.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

volume = area × depth

Worked example

Using the values pre-filled in the calculator above:

  • Area to mulch = 25 m²
  • Depth: Standard (75 mm)
  • Material: Bark chips (350 kg/m³)
  • Price per m³ = 40

the calculator returns:

  • Mulch needed: 1.875 m³
  • In litres: 1,875
  • Weight: 656 kg
  • In tonnes: 0.656