Mulch How Much Does a Yard of Mulch Cover?
Short answer: one cubic yard of mulch covers 324 sq ft at 1 inch, 162 sq ft at 2 inches, 108 sq ft at 3 inches and 81 sq ft at 4 inches. Most beds need 2–3 inches, so plan on roughly 100–160 sq ft per yard.
Key takeaways
- One cubic yard (27 cu ft) covers 324 sq ft at 1 inch, 162 at 2 inches, 108 at 3 inches and 81 at 4 inches.
- Square feet covered = 324 ÷ depth in inches. Yards needed = square feet × inches ÷ 324.
- A yard equals 13.5 bags of 2 cu ft or 9 bags of 3 cu ft.
- For top-ups, use only the depth you’re adding. That can halve the order.
- Add 5–10% and round up to the increment your supplier sells.
Why those numbers
A cubic yard is 3 ft × 3 ft × 3 ft = 27 cubic feet. Spread it 1 inch (1/12 ft) deep and it covers 27 × 12 = 324 sq ft. Every extra inch of depth divides that figure: 324 ÷ depth in inches = square feet covered.
Coverage table
| Amount | 1 in | 2 in | 3 in | 4 in |
|---|---|---|---|---|
| 1/4 yard | 81 sq ft | 40.5 sq ft | 27 sq ft | 20.25 sq ft |
| 1/2 yard | 162 sq ft | 81 sq ft | 54 sq ft | 40.5 sq ft |
| 1 yard | 324 sq ft | 162 sq ft | 108 sq ft | 81 sq ft |
| 2 yards | 648 sq ft | 324 sq ft | 216 sq ft | 162 sq ft |
| 3 yards | 972 sq ft | 486 sq ft | 324 sq ft | 243 sq ft |
| 5 yards | 1,620 sq ft | 810 sq ft | 540 sq ft | 405 sq ft |
How many bags make a yard?
- 2 cu ft bags (the most common size): 13.5 bags per yard.
- 3 cu ft bags: 9 bags per yard.
- 1.5 cu ft bags: 18 bags per yard.
If you need more than about 1.5–2 yards, compare the bagged price with bulk delivery in our bags vs bulk guide.
Allow a little extra
Fresh mulch settles and the edges of a bed are rarely perfectly straight. Ordering 5–10% more than the geometric figure avoids a second trip. Our mulch calculator lets you add a settling allowance automatically.
Worked examples: from bed to delivery order
1. New foundation bed. A 60 × 4 ft bed along the house is 240 sq ft. At 3 inches: 240 × 3 ÷ 324 = 2.22 yd³. Add 10% for settling: 2.22 × 1.1 = 2.44 yd³. If your supplier sells by the half yard, order 2.5 yards.
2. Annual top-up. A 400 sq ft bed still has 1.5 inches of mulch and you want 3 inches. You add 1.5 inches: 400 × 1.5 ÷ 324 = 1.85 yd³. Starting from bare soil it would be 400 × 3 ÷ 324 = 3.70 yd³, twice as much. University of Illinois Extension recommends checking the depth of existing mulch before adding more.
3. Mixed depths in one order. A 150 sq ft shrub bed in coarse wood chips at 3 inches (150 × 3 ÷ 324 = 1.39 yd³) plus a 200 sq ft flower bed at 2 inches (200 × 2 ÷ 324 = 1.23 yd³) totals 2.62 yd³. Work out each bed separately, then add them up. Averaging the depths gives the wrong answer when the beds differ in size.
| Bed | Area | Depth | Yards needed | Cubic feet | Or 2 cu ft bags |
|---|---|---|---|---|---|
| Foundation bed (60 × 4 ft) | 240 sq ft | 3 in | 2.22 | 60 | 30 |
| Top-up (400 sq ft, add 1.5 in) | 400 sq ft | 1.5 in | 1.85 | 50 | 25 |
| Shrub bed (coarse chips) | 150 sq ft | 3 in | 1.39 | 37.5 | 19 |
| Flower bed | 200 sq ft | 2 in | 1.23 | 33.33 | 17 |
Mistakes that make a yard come up short
- Confusing square yards with cubic yards. Mulch is sold by volume. One cubic yard is 27 cu ft, while a square yard is only 9 sq ft of area.
- Measuring depth in feet without converting. 3 inches is 0.25 ft, not 3 ft. Use the ÷ 324 shortcut so you never have to convert.
- Measuring a slope’s footprint. On a bank, measure along the ground surface, not the level distance across.
- Forgetting the extra for coarse mulch. Coarse mulches are usually laid 3–4 inches deep, so a yard covers only 81–108 sq ft.
Prefer a ready answer? The bed size table lists yards for 100 to 1,000 sq ft, and how to calculate mulch covers odd shapes.
Which depth should you use?
For most shrub and flower beds 2–3 inches is enough; going beyond 4 inches can harm plants. See how deep mulch should be for details.
Frequently asked questions
How many square feet does a yard of mulch cover at 3 inches?
108 square feet, because 324 ÷ 3 = 108.
How many yards of mulch do I need for 1,000 square feet?
6.17 cubic yards at 2 inches or 9.26 cubic yards at 3 inches (1,000 × depth ÷ 324).
Is 1 yard of mulch enough for 200 square feet?
Not at 2 inches or deeper: 200 sq ft needs 1.23 yards at 2 inches and 1.85 yards at 3 inches. One yard covers 162 sq ft at 2 inches.
How many wheelbarrow loads are in a yard of mulch?
Divide 27 by your wheelbarrow’s capacity in cubic feet. A 6 cu ft wheelbarrow filled level takes 4.5 loads to move one cubic yard.
How deep should I spread a yard of mulch?
University of Illinois Extension recommends 2 to 4 inches: 2–3 inches for composted materials and 3–4 inches for coarse mulches.