How much mulch do you actually need?
Enter your bed size and depth and get a precise answer in bags or cubic yards — no sign-up, no guessing, no half-empty pallet left in the driveway.
Quick reference: common bed sizes
Rough estimates at 3-inch depth, 2 cubic foot bags. Use the calculator above for your exact numbers.
| Bed size | Area | Volume | Bags (2 cu ft) |
|---|---|---|---|
| Small bed (5 × 5 ft) | 25 sq ft | 6.3 cu ft | 4 |
| Standard bed (10 × 10 ft) | 100 sq ft | 25 cu ft | 13 |
| Border bed (20 × 3 ft) | 60 sq ft | 15 cu ft | 8 |
| Large bed (15 × 15 ft) | 225 sq ft | 56.3 cu ft | 29 |
| Whole yard border (50 × 4 ft) | 200 sq ft | 50 cu ft | 25 |
Common questions
How much mulch do I need for a 10x10 bed?
A 10×10 ft bed is 100 sq ft. At a standard 3-inch depth, that's 25 cubic feet of mulch, or about 0.93 cubic yards. At 2 cubic feet per bag, that's around 13 bags. Use the calculator above with your exact numbers for a precise figure.
How deep should mulch be?
2–3 inches is standard for maintaining existing beds. New beds or areas with heavy weed pressure benefit from 3–4 inches. Avoid going deeper than 4 inches — overly thick mulch can suffocate roots and hold too much moisture against stems and trunks.
How many bags of mulch equal a cubic yard?
A cubic yard is 27 cubic feet. At the common 2 cubic foot bag size, that's about 13.5 bags per cubic yard. Buying in bulk by the cubic yard is usually cheaper than bags once you need more than about 3 cubic yards.
Should I buy mulch in bags or bulk?
Bags are more convenient for small beds and easier to store leftovers from. Bulk delivery by the cubic yard is significantly cheaper per unit for larger areas — typically once you need more than 2–3 cubic yards — but needs somewhere to dump the pile and more work to move it.