This calculator estimates mulch volume and bag count for any garden bed, path, or landscaping area. Enter your dimensions and target depth — get cubic yards, bags, wheelbarrow loads, and optional pricing for both bagged and bulk mulch.
Recommended Mulch Depths
Light refresh / topdressing: 2 in (50 mm)
Standard garden beds (most common): 3 in (75 mm)
Weed suppression / new beds: 4 in (100 mm)
Around trees: 2–4 in, pulled back 2–3 in from trunk flare
Mulch Buying Tips
Bulk mulch is typically cheaper than bags for areas over 2–3 cubic yards.
Order 5–10% extra to cover settling, uneven surfaces, and edging.
Top up mulch annually — it breaks down and enriches soil over time.
Never pile mulch against plant stems or tree trunks — leave a gap to prevent rot.
Frequently Asked Questions
Multiply bed area × depth in feet ÷ 27. For a 200 sq ft bed at 3 inches: 200 × 0.25 ÷ 27 = 1.85 cubic yards. Add 10% waste = about 2 yards to order. Enter your dimensions above for an instant result in both yards and bags.
One cubic yard = 27 cubic feet. At 2 cu ft bags: approximately 13.5 bags (round up to 14). At 3 cu ft bags: 9 bags. A 200 sq ft bed at 3 inches (1.85 yd³) needs about 26 bags of 2 cu ft or 17 bags of 3 cu ft.
At 3 inches deep: one 2 cu ft bag covers approximately 8 sq ft. At 2 inches: 12 sq ft. At 4 inches: 6 sq ft. See the coverage chart above — it updates when you change bag size or units.
Use 2–3 inches for topdressing established beds. Use 3–4 inches for new beds or heavy weed suppression. Do not exceed 4 inches — thick mulch prevents water and oxygen from reaching roots. Always pull mulch back 2–3 inches from plant stems and tree trunks to prevent rot.
At 3 inches deep: 1,000 sq ft × 0.25 ft ÷ 27 = 9.26 cubic yards. Add 10% waste = approximately 10.2 yards to order. At 2 inches: 6.2 yards. At 4 inches: 12.3 yards. At 3 cu ft bags: about 83 bags needed for 9.26 yards.
No — mulch is sold by volume, not weight. Weight varies significantly with wood type and moisture content, so volume (cubic yards or cubic feet) is the reliable basis for ordering. Bulk mulch is measured in cubic yards; bagged mulch is measured in cubic feet per bag.
Disclaimer: Estimates are for general planning only. Actual quantities vary with mulch type, compaction, and surface conditions. Always confirm with your supplier before ordering.