Mulch Bags Calculator
Count mulch bags for a bed area and depth, with a waste allowance.
Quick answer: enter your details below and click Count Mulch Bags — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Measure the bed area in square metres.
- Enter the mulch depth in centimetres.
- Enter the bag volume and click Count Mulch Bags.
About this tool
Enter the bed area and the mulch depth, and the tool works out the volume, adds a 10 percent allowance for settling and uneven spreading, and divides by the bag volume. The allowance is shown separately.
Frequently asked questions
Does mulch settle much?
Yes, fresh mulch settles noticeably in the first weeks, which is why the allowance matters.
Can I use bulk mulch instead?
For large beds, bulk delivery is often cheaper; use the volume figure, not the bag count, for that order.