Calculate how much mulch you need in cubic yards and bags. Perfect for garden beds, trees, and landscaping.
Step 1: Calculate the area. Area (sq ft) = Length x Width
Step 2: Convert depth to feet. Depth (ft) = Depth (inches) / 12
Step 3: Calculate volume. Volume (cu ft) = Area x Depth
Step 4: Convert to cubic yards. Cubic yards = Cubic feet / 27
Bag conversion: One 2 cu ft bag covers about 12 sq ft at 2 inches deep. One cubic yard = 13.5 bags (2 cu ft each).
2 inches: Minimal weed suppression. Good for refreshing existing mulch beds.
3 inches: Standard depth. Good weed suppression and moisture retention. Best for most garden beds.
4 inches: Maximum for most applications. Great for weed suppression around trees and shrubs.
6 inches: Only for pathways or playground areas. Do not use this depth around plant stems or tree trunks.
Important: Keep mulch 3-6 inches away from plant stems and tree trunks to prevent rot and pest problems.
One cubic yard of mulch covers:
1 inch deep: 324 sq ft. 2 inches deep: 162 sq ft. 3 inches deep: 108 sq ft. 4 inches deep: 81 sq ft.