Estimate only
This estimate uses the dimensions and allowance you enter. Measure the actual area and check the product label before buying compost.
Compost Calculator
Estimate the volume of compost needed for a rectangular bed at a chosen depth.
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About Compost Calculator
Compost Calculator estimates compost volume in cubic metres and bag counts needed for garden potting, raised beds, and soil conditioning.
How to use Compost Calculator
- Enter planter or bed dimensions (length, width, depth).
- Specify number of identical planters or garden beds.
- Click Calculate to determine total compost volume.
- Review bag counts for standard 50L or 70L compost bags.
Examples
Bed: 2m x 1m, Depth: 15cm Result: 0.30 cubic metres (300 litres = 6 bags of 50L compost).
FAQ
How many litres of compost are in a cubic metre?
There are 1,000 litres in one cubic metre.
What depth of compost is recommended for vegetable raised beds?
A depth of 15cm to 30cm of rich compost provides optimal root depth for most garden vegetables.