Estimate only
This estimate uses the dimensions and allowance you enter. Measure the actual area and check the product label before buying mulch.
Mulch Calculator
Estimate the volume of mulch needed for a rectangular bed at a chosen depth.
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About Mulch Calculator
Mulch Calculator estimates wood mulch or bark chip volume in cubic metres and bag counts for garden beds at a selected coverage depth.
How to use Mulch Calculator
- Enter flower bed length and width in metres.
- Select recommended mulch depth (typically 5cm to 7.5cm for weed suppression).
- Click Calculate to calculate total mulch volume.
- View cubic metres and standard 50-litre bark bag counts.
Examples
Bed: 6m x 2m (12m² area), Depth: 5cm Result: 0.60 cubic metres of mulch required (12 bags of 50L bark).
FAQ
How often should garden mulch be topped up?
Organic bark mulch breaks down over time and should be topped up with a fresh 2.5cm layer every 1 to 2 years.
Does mulch prevent weeds completely?
A 5cm layer suppresses most weed seeds from germinating by blocking sunlight.