🛍️How many bags of mulch do you need?

✓ Tested & verified Updated: Aug 6, 2026 How we calculate this

Bags of mulch calculator

Bed area (sq ft)

$ per bag (optional)

Depth

50 bags at 2 cu ft

= 100 cu ft · 3.7 cubic yards

Bag size	Bags per cubic yard	Bags you need	Cost at that price
0.75 cu ft	36	134	$574.86
1 cu ft	27	100	$429.00
1.5 cu ft	18	67	$287.43
2 cu ft	13.5	50	$214.50
3 cu ft	9	34	$145.86

Bag counts always round up — no store sells two thirds of a bag.

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How many bags of mulch do you need?

Multiply the bed area by the depth in feet, then divide by the bag size — a 400 sq ft bed at 3 inches deep takes 50 bags of the standard 2 cu ft mulch. That bed holds 400 × 0.25 = 100 cubic feet, which is 3.7 cubic yards, and 100 ÷ 2 = 50 bags with nothing left over.

Change the bag and the count changes with it: the same 100 cubic feet is 34 bags of the 3 cu ft size pine bark and cypress come in, 67 bags of 1.5 cu ft, or 134 of the 0.75 cu ft premium and rubber blends. The table above prices all five at once, which is the comparison the shelf tag never lets you make — a 3 cu ft bag at $6 is cheaper per cubic foot than a 2 cu ft bag at $4.29.

Round up every time. Half a bag is not a thing you can buy, and a bed finished two bags short means a second trip for the sake of about eight dollars.

Bag size is the only variable in this niche that stores make genuinely hard to compare. Two brands sit on the same pallet at the same price, one holds 2 cubic feet and the other 3, and the shelf tag prices both per bag. The fix is to convert everything to cost per cubic foot before you decide — which is what the table above does the moment you type a price.

The other half of the job is knowing which size your mulch actually comes in, because that decides how many trips the car makes.

Bag size	Bags per cubic yard	Covers at 3 in	Typical material
0.75 cu ft	36	3 sq ft	Premium decorative and rubber mulch
1 cu ft	27	4 sq ft	Compost, soil conditioner
1.5 cu ft	18	6 sq ft	Topsoil, dyed and rubber mulch
2 cu ft	13.5	8 sq ft	Shredded hardwood — the US default
3 cu ft	9	12 sq ft	Pine bark, cypress, pine fines

Past about 40 bags you are moving a cubic yard and a half by hand, twice — once into the car and once onto the bed. That is the point most people wish they had priced bulk delivery.

Frequently asked questions

How many bags of mulch are in a cubic yard?

13.5 bags of 2 cu ft, 9 bags of 3 cu ft, 18 bags of 1.5 cu ft, 27 bags of 1 cu ft and 36 bags of 0.75 cu ft. Every one of those is 27 divided by the bag size, because a cubic yard is 27 cubic feet. The 13.5 is the one worth memorising: it is the number that turns a bulk price into a bag price.

How many square feet does one bag of mulch cover?

A 2 cu ft bag covers 12 sq ft at 2 inches, 8 sq ft at 3 inches and 6 sq ft at 4 inches. A 3 cu ft bag covers 18, 12 and 9 sq ft at those depths. The arithmetic is bag size divided by depth in feet, so at 3 inches you divide by 0.25 — which is the same as multiplying by four.

Which mulches come in 3 cu ft bags?

Pine bark, pine fines and cypress are almost always 3 cu ft, because they are light enough that a bigger bag is still liftable. Shredded and double-shredded hardwood is the 2 cu ft default. Dyed mulch is usually 2 cu ft, and rubber and premium decorative blends drop to 1.5 or 0.75 cu ft because they are heavy or expensive per cubic foot.

How many bags of mulch fit in a car?

About 8 to 10 bags of 2 cu ft in a sedan boot with the parcel shelf out, 15 to 20 in an SUV with the seats down, and 40 or so in a half-ton pickup bed before weight rather than space becomes the limit. Dry hardwood mulch runs about 52 lb per 2 cu ft bag, so 40 bags is roughly 2,080 lb — already over a half-ton payload.

Is it cheaper to buy mulch by the bag or by the yard?

Per cubic yard, bags almost always cost more: 13.5 bags at $4.29 is $57.92, against $35 to $50 for a bulk yard. Bags win only until the delivery fee is spread thin enough, which normally happens somewhere between two and four yards. The cost calculator works out the exact crossing point for your prices.

Should I buy an extra bag?

Buy one spare per 20 bags and keep the receipt. Bags are returnable at every big-box store and bulk is not, so the spare costs you nothing but a trip you were making anyway — and beds always measure a little larger than the tape suggested once you follow the actual edge.

How we calculate this

Volume is area × depth ÷ 12 to get cubic feet, then ÷ 27 for cubic yards. Bag counts are cubic feet ÷ bag size, always rounded up to the next whole bag. Bags per cubic yard is 27 ÷ bag size, giving 36, 27, 18, 13.5 and 9 for the 0.75, 1, 1.5, 2 and 3 cu ft sizes stocked in the US. The per-bag weight quoted above uses 700 lb per cubic yard for dry shredded hardwood from our density table, which is 700 ÷ 13.5 ≈ 52 lb for a 2 cu ft bag. Prices are whatever you type in; nothing is stored and nothing is sent anywhere.

Worked example

With Bed area (sq ft) 400, $ per bag (optional) 4.29, Depth 3, this page works out 50 bags at 2 cu ft. = 100 cu ft · 3.7 cubic yards

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