Mulch Volume Calculator

How many cubic yards or 2-cubic-foot bags of mulch do you need for a flowerbed or landscape area?

Inputs

2-4 in is standard for shrub beds; 1-2 in around annuals.

Result

Loading calculator…

General calculation reads

Amazon affiliate

As an Amazon Associate we may earn from qualifying purchases. This does not add cost for you.

How to use this calculator

  • Enter the bed dimensions.
  • Pick a depth — 3 inches is the sweet spot for most beds.
  • Compare bag count vs cubic yard pricing to decide bulk vs bagged.

About this calculator

Mulch is sold by both bulk cubic yard and 2-ft³ bag. One cubic yard equals 13.5 bags, so a 1-yd³ pile saves a lot of bag-hauling. Most beds need 2-4 inches; deeper than that smothers roots.

Frequently asked

How deep should mulch be?+
2-4 inches for shrub beds. 1-2 inches around annuals to avoid burying stems.
When should I refresh mulch?+
Once a year is standard. Top off to 2-3 inches; don't pile it deeper, especially against tree trunks ("mulch volcanoes" rot bark).
Bulk vs bags?+
Bulk is cheaper per yard and reduces plastic, but you need a way to haul it. Bags are convenient for jobs under ~5 yards.
Does color-enhanced mulch hurt plants?+
No — modern mulch dyes are non-toxic. They fade in 1-2 years.
How much area does a yard of mulch cover?+
At 3 inches deep, 1 yd³ covers about 108 ft².

Related calculators

More tools you might like

Hand-picked tools that pair well with this one — same audience, same intent.