How deep should mulch be?

2–4 inches is the recommended range. 2 inches for fine mulches; 3–4 inches for coarser wood chips. Avoid piling mulch against plant stems.

When is bulk mulch cheaper than bags?

Typically when you need more than 2–3 cubic yards. One cubic yard = 13.5 bags of 2 cu ft each, at a per-bag price usually 2–3× the bulk cost per yard.

Mulch Calculator

Enter bed size and depth to find cubic yards and number of bags needed.

Enter your garden bed dimensions and desired mulch depth to find out how many cubic yards or bags of mulch to buy. Most landscapers recommend 2–3 inches of mulch depth for weed suppression and moisture retention.

Last reviewed: April 2026Report an error

Length (ft)

Width (ft)

Depth (inches)

Cubic Yards

0.93 yd³

A 10×10 ft bed at 3" deep needs 25.00 cu ft (0.93 cu yd). That's 13 bags (2 cu ft) or 9 bags (3 cu ft).

Cubic Feet

25.00

Cubic Yards

0.93

2 cu ft Bags

3 cu ft Bags

How to Use This Mulch Calculator

Enter the length and width of your garden bed in feet.
Enter the desired mulch depth in inches (2–4 inches is typical).
Read cubic feet, cubic yards, and number of 2 cu ft and 3 cu ft bags.
For beds over 3 cubic yards, buying bulk mulch by the yard is usually cheaper than bags.

Frequently Asked Questions

: 2–4 inches is the recommended range. 2 inches for fine mulches; 3–4 inches for coarser wood chips. Avoid piling mulch against plant stems.
: Typically when you need more than 2–3 cubic yards. One cubic yard = 13.5 bags of 2 cu ft each, at a per-bag price usually 2–3× the bulk cost per yard.

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Mulch Calculator

How to Use This Mulch Calculator

Frequently Asked Questions

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