How much mulch do you need for 100 square feet?

Covering 100 square feet (for example a 10×10 ft bed) with mulch 3 inches deep takes 0.93 cubic yards — that's 13 bags of 2 cu ft or 9 bags of 3 cu ft. At 2 inches you need 0.62 yards.

Change the numbers

The calculator below is pre-filled for this project. Adjust any value — including feet and inches — and the results update instantly.

Several beds? Add up their square footage and use “Total area”.

Your results

Mulch needed0.93 cu yd

2 cu ft bags13

3 cu ft bags9

Cubic feet25 cu ft

One cubic yard covers108 sq ft at this depth

How much mulch do you need for 100 square feet — diagram

Mulch for 100 sq ft at every depth

Depth	Cubic yards	2 cu ft bags	3 cu ft bags
1 in	0.31	5	3
2 in	0.62	9	6
3 in	0.93	13	9
4 in	1.23	17	12

Bags or bulk?

At 0.93 cubic yards, bags are the convenient choice — about 13 bags of 2 cu ft fit in most car trunks over one or two trips.

The math

100 sq ft × 3 in ÷ 12 = 25 cu ft 25 ÷ 27 = 0.93 cu yd 25 ÷ 2 cu ft = 13 bags (rounded up)

Common questions

How many bags of mulch for 100 square feet?

13 bags of 2 cu ft at 3 inches deep, or 9 bags at 2 inches.

How many yards of mulch for 100 square feet?

0.93 cubic yards at 3 inches, 0.62 at 2 inches.

Want the full method, tips and other sizes? See the mulch calculator guide.

Last reviewed November 1, 2026. Results are estimates — confirm with your supplier.

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