Mulch Calculator
Enter the bed area and depth to see how much mulch to order in bulk yards or bags.
Results are estimates for planning only. Always confirm measurements, local codes and manufacturer specs before ordering materials or quoting a job. See our Terms.
How much mulch do I need?
Cubic yards = length x width (ft) x depth (in) / 12 / 27. One cubic yard covers about 108 sq ft at 3 inches deep.
Most beds need 2 to 3 inches of fresh mulch; refresh existing beds with 1 inch. Bulk delivery is usually cheaper than bags above about 2 cubic yards.
Questions
How many bags of mulch in a yard?
One cubic yard equals 27 cubic feet: about 13.5 bags of 2 cu ft or 9 bags of 3 cu ft.
How deep should mulch be?
2 to 3 inches for most beds. Keep it pulled back a few inches from tree trunks and plant stems.
How much area does a yard of mulch cover?
About 162 sq ft at 2 inches, 108 sq ft at 3 inches, and 81 sq ft at 4 inches.