Mulch Calculator

Find how many cubic yards or bags of mulch you need for a garden bed.

Quick answer: Mulch Calculator: Find how many cubic yards or bags of mulch you need for a garden bed. Everything runs in your browser, so nothing you enter is uploaded or stored.

Bed length (ft)

Bed width (ft)

Depth (inches)

How to use Mulch Calculator

Enter your values in the fields.
The results update instantly as you type.
Note or copy the numbers you need.

Features

Instant results
Free, no signup
Runs in your browser, nothing is uploaded
Works on phone and desktop

How it works

Volume = length x width x depth (in feet). There are 27 cubic feet in a cubic yard.

Worked example

A 20 by 6 foot bed at 3 inches deep needs 30 cubic feet, which is 1.1 cubic yards or 15 bags.

Good to know

Buy 5 to 10 percent extra for uneven ground.

Frequently asked questions

How deep should mulch be?

Two to three inches is common for beds. Keep it away from tree trunks.

How many bags make a cubic yard?

A cubic yard equals 13.5 bags of 2 cubic foot mulch.

Is the Mulch Calculator free?

Yes. It is free, needs no signup and works on any device.