How to calculate mulch
Multiply the landscaping area by the desired mulch depth. Convert depth from inches to feet before calculating cubic feet.
Mulch calculation example
A 20-foot by 10-foot bed with 3 inches of mulch requires 50 cubic feet, or approximately 1.85 cubic yards.
Bulk mulch vs. bagged mulch
Bulk material is commonly ordered by the cubic yard. Bagged mulch is usually labeled by cubic feet, so the calculator converts the same volume into common bag sizes.
For complex shapes, divide the area into simpler rectangles, calculate each section separately and add the results.
Frequently asked questions
How many cubic feet are in a cubic yard?
One cubic yard equals 27 cubic feet.
How many 2-cubic-foot bags are in one cubic yard?
One cubic yard contains 27 cubic feet, so it equals 13.5 bags of 2 cubic feet each.
How many 3-cubic-foot bags are in one cubic yard?
One cubic yard equals 9 bags of 3 cubic feet each.
Should I round bag quantities up?
Yes. You cannot normally purchase a fraction of a bag, so bag estimates should be rounded up.
Using this calculator effectively
The mulch calculator converts bed area and depth into cubic yards and can help translate a bulk quantity into bags. It is useful for garden beds and landscaping areas where depth has a large effect on the final order quantity.
Common uses
- Estimating bulk mulch for garden and landscape beds.
- Comparing different application depths.
- Converting a bulk-volume requirement into approximate bag quantities.
Tips for a better estimate
- Measure curved or irregular beds in smaller sections and add the areas together.
- Use the actual bag volume printed on the product when converting to bags.
- Consider settling and existing mulch depth before choosing how much new material to apply.
Helpful guides
Related calculations
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