How many bags of mulch are in a cubic yard?

One cubic yard equals 27 cubic feet, so it takes 13.5 bags of 2-cubic-foot mulch, 18 bags of 1.5-cubic-foot mulch, or 9 bags of 3-cubic-foot mulch to equal one yard.

How much area does a yard of mulch cover?

One cubic yard of mulch covers 324 square feet at 1 inch deep, 162 square feet at 2 inches, 108 square feet at 3 inches, or 81 square feet at 4 inches.

Is bulk mulch cheaper than bagged?

Usually yes. Bulk mulch typically costs 30–50% less per cubic yard than the equivalent in bags once you need more than about half a yard (7 bags), though bagged mulch is easier to transport and store.

Mulch Calculator – Cubic Yards & Bags

Q: How deep should mulch be?

2 to 4 inches is ideal for most beds. Use 2 inches for annual refreshes over existing mulch and 3 inches for new beds. More than 4 inches can suffocate roots and hold excess moisture against stems.

Q: How much does a yard of mulch weigh?

A cubic yard of wood mulch weighs roughly 400 to 800 pounds depending on type and moisture. Dry shredded hardwood runs about 400–500 lbs, while fresh or wet mulch can approach 800 lbs. Most pickup trucks can carry 2–3 yards.

Use this mulch calculator to find how many cubic yards or bags of mulch you need. Enter your bed dimensions and depth, and the calculator converts the volume into yards plus bag counts for all three common bag sizes (1.5, 2, and 3 cubic feet).

Length (ft)

Width (ft)

Depth (in)

How to calculate mulch by hand

Mulch is sold by the cubic yard (bulk delivery) or by the bag. The math is one formula:

cubic yards = length (ft) × width (ft) × depth (ft) ÷ 27\nbags (2 cu ft) = cubic feet ÷ 2

Worked example: a 20 ft × 10 ft bed at 3 inches deep. Depth in feet is 3 ÷ 12 = 0.25. Volume is 20 × 10 × 0.25 = 50 cubic feet, which is 50 ÷ 27 ≈ 1.85 cubic yards — or 50 ÷ 2 = 25 bags of 2 cu ft mulch.

Mulch coverage chart

Depth	1 yard covers	1 bag (2 cu ft) covers	Best for
1"	324 sq ft	24 sq ft	Light top-up only
2"	162 sq ft	12 sq ft	Annual refresh
3"	108 sq ft	8 sq ft	New beds (recommended)
4"	81 sq ft	6 sq ft	Weed suppression, max depth

Bags per cubic yard

Bag size	Bags per cubic yard	Common products
1.5 cu ft	18	Premium hardwood, dyed mulch
2 cu ft	13.5	Standard size at Home Depot, Lowe’s
3 cu ft	9	Pine bark nuggets, economy mulch

How deep should mulch be?

The sweet spot for most beds is 2 to 4 inches. Two inches is enough when refreshing existing mulch each spring; three inches is the standard for new beds and gives good weed suppression. Going past four inches does more harm than good — thick mulch layers hold moisture against stems, invite fungus and rot, and can suffocate shallow roots.

Keep mulch 2–3 inches away from tree trunks and plant stems. The “mulch volcano” piled against a trunk is the most common mulching mistake and a leading cause of bark rot in landscape trees.

FAQ

How many bags of mulch in a yard?

13.5 bags at 2 cu ft, 18 bags at 1.5 cu ft, or 9 bags at 3 cu ft — a yard is always 27 cubic feet.

How much does a yard of mulch cover?

324 sq ft at 1" deep, 162 sq ft at 2", 108 sq ft at 3", 81 sq ft at 4".

How deep should mulch be?

2–4 inches. Use 2" for refreshes, 3" for new beds. Never bury stems or trunks.

How much does a yard of mulch weigh?

Roughly 400–800 lbs depending on type and moisture. Most pickups can haul 2–3 yards.

Is bulk cheaper than bagged?

Above ~half a yard (7 bags), bulk is usually 30–50% cheaper per yard. Bags win on convenience and storage.