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Mulch for 400 sq ft
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3.70 yd³
Mulch for 400 ft² at 3 in deep · 50 × 2 ft³ bag
Mulch for 400 ft² by depth
| Depth | yd³ | ft³ | Bags | Bulk / bagged cost |
|---|---|---|---|---|
| 2 in | 2.47 | 66.7 | 34 | $99 / $153 |
| 3 in | 3.70 | 100.0 | 50 | $148 / $225 |
| 4 in | 4.94 | 133.3 | 67 | $198 / $302 |
2–3 in is the usual depth for beds; 4 in for paths and weed suppression. Keep mulch a few inches away from tree trunks.
How it is calculated
Volume = area × depth: 400 ft² × (3 ÷ 12) ft = 100.0 ft³; ÷ 27 = 3.70 yd³. 400 ft² is, for example, a 20.0 × 20.0 ft square or a 40 × 10 ft strip.
FAQ
How much mulch do I need for 400 square feet?
At 3 in deep, 400 ft² needs 3.70 cubic yards (100.0 ft³) – about 50 × 2 ft³ bag.
Is it cheaper to buy mulch in bulk or bags for 400 sq ft?
At typical prices ($40/yd³ bulk vs $4.50 per bag) bulk costs about $148 versus $225 in bags, before delivery. Bulk delivery usually wins above about 1 cubic yard.
Other areas: 200 ft² · 250 ft² · 300 ft² · 500 ft² · 600 ft² · 750 ft² · all areas · mulch calculator
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