How do I calculate how much mulch I need?

Multiply the bed length by width to get square feet, multiply by mulch depth in feet, then divide by 27 for cubic yards. Add 5% to 15% extra for edges, settling, and uneven beds.

How many bags of mulch are in a cubic yard?

One cubic yard is 27 cubic feet. A 2 cubic foot bag covers about 13.5 bags per cubic yard, so most projects need 14 bags for each cubic yard before waste.

How deep should mulch be?

Most planting beds use 2 to 3 inches of mulch. Refresh layers are often 1 to 2 inches, while new beds may need closer to 3 inches after weeds are cleared.

Is bulk mulch cheaper than bagged mulch?

Bulk mulch is often cheaper for larger projects, especially above 2 cubic yards. Bagged mulch can be easier for small beds, tight access, or projects without a truck.

How much extra mulch should I order?

Order about 10% extra for most beds. Increase the waste allowance for curved edges, tree rings, sloped beds, or areas where mulch will settle into uneven soil.

Landscape bed mulch estimator

Free Mulch Calculator

A mulch calculator estimates how much mulch you need from bed length, width, depth, waste, bag size, and local pricing. Use it to compare cubic yards, bag counts, bulk delivery cost, and bagged mulch cost before you buy.

Project details

Length

Width

Mulch depth

Mulch typeWaste allowance

Bag size

cu ft

Price per bag

Bulk price

$/ cu yd

New beds

Use 2 to 3 inches for most beds after weeds are removed and the soil is shaped away from buildings.

Tree rings

Keep mulch away from trunks and spread it as a broad, shallow ring instead of piling it at the bark.

Curb areas

Measure around signs, tree wells, and access paths so delivery, spreading, and cleanup stay practical.

Mulch calculator FAQ

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