Two to three inches is common for fresh mulch; use less if you are topping up an existing bed.
Landscaping
Mulch Calculator
Measure the bed area and choose your depth to estimate how much mulch you need in cubic yards or bags.
Example estimate ready.Change the measurements and product prices below. Values save only on this device.
Calculation method
How the estimate is built.
The bed area multiplied by mulch depth gives cubic feet. We convert cubic feet to bulk cubic yards by dividing by 27, then separately round bagged mulch up to full bags for easy price comparison.
Field notes
Use the estimate well.
Keep mulch a few inches away from trunks, stems, siding, and weep holes.
Bulk delivery is often cheaper for larger beds, while bags can be easier for small touch-ups.
FAQ
Mulch questions
How deep should mulch be?
Many landscape beds use 2 to 3 inches of mulch. Too much depth can hold moisture against plants and structures.
How many cubic feet are in a cubic yard?
One cubic yard contains 27 cubic feet.
How many bags of mulch are in a yard?
One cubic yard is 27 cubic feet, so it equals about 14 two-cubic-foot bags or 9 three-cubic-foot bags before rounding or delivery policies.
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