Mulch Calculator
Enter your bed dimensions and the mulch depth (2–3 inches is typical). Get the volume in cubic yards plus the number of standard 2 cubic-foot bags.
Your measurements
ft
ft
in
Bagged mulch is usually 2 ft³; some hardwood and rubber mulch is 1.5 or 3 ft³.
Mulch needed
20 bags
2 ft³ bags · or 1.48 yd³ bulk
Estimates only. Verify against your supplier's coverage figures before ordering.
Footprint
Footprint to scale
Coverage
- Bed area
- 160 ft²
The formula
Bags = (Length ft × Width ft × (Depth in ÷ 12)) ÷ bag size (ft³)
Example: A 20 ft × 8 ft bed at 3 in deep = 40 ft³ → 20 × 2 ft³ bags, or 1.48 yd³ bulk.
How it works
- 1Multiply bed area by depth (in feet) to get cubic feet.
- 2Bagged mulch is usually sold in 2 ft³ bags — divide cubic feet by the bag size.
- 3Bulk mulch is sold by the cubic yard (27 ft³) and is cheaper for large beds.
Frequently asked questions
How deep should mulch be?
2–3 inches is ideal. Deeper than 3 inches can suffocate roots and waste material; thinner won't suppress weeds well.