Mulch Calculator
Find how much mulch you need by area and depth.
The right amount of mulch
Buying mulch means converting an area and a depth into a volume, then into cubic yards for bulk or bags for retail. It is easy to over- or under-buy without the maths.
Enter the bed dimensions and desired depth, and it returns the volume in cubic feet and cubic yards plus the number of two-cubic-foot bags. A 20 by 10 foot bed at 3 inches needs about 1.85 cubic yards.
Practical and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
How much mulch do I need?
It depends on the area to cover and how deep. Two to three inches is typical for garden beds.
What units does it give?
Cubic feet, cubic yards, and the number of standard two-cubic-foot bags.
Why cubic yards?
Bulk mulch is usually sold by the cubic yard, while bagged mulch comes in cubic feet — the tool gives both.
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