Formula and Assumptions
Volume = length x width x depth. Cubic yards = cubic feet / 27.
Actual conditions, local rates, product labels, and contractor recommendations can change the final quantity or cost.
Example Calculation
A 20 x 6 ft bed at 3 inches deep needs about 30 cubic feet or 15 two-cu-ft bags.
Tips
- Keep mulch away from siding and tree trunks.
- Use 2-3 inches for many beds.
- Buy bulk for larger areas.
FAQ
How deep should mulch be?
Many beds use 2 to 3 inches.
Does old mulch count?
If old mulch remains, use a smaller top-up depth.
What is a cubic yard?
One cubic yard is 27 cubic feet.
Can this estimate bags?
Yes, enter the bag size.