Mulch Calculator

Bed length (ft) Bed width (ft)

Depth (in) — 2-3" for topping up, 3-4" for a new bed Bag size (cubic ft)

Bags needed —

Cubic yards —

Cubic feet —

Bulk (by the cubic yard) is usually cheaper than bags once you need more than about 2-3 cubic yards — worth checking bulk delivery pricing for larger beds.

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Free mulch calculator — enter your garden bed's size and desired depth and get the cubic yards, cubic feet, and number of bags needed.

How it works

Enter your bed's length and width
Set your desired mulch depth and bag size
See the cubic yards, cubic feet, and bag count needed

Frequently asked questions

How deep should mulch be?

2-3 inches is typical for topping up an existing bed; 3-4 inches for a brand new bed. Much deeper than 4 inches can actually suffocate plant roots rather than help them.

Bags or bulk?

Bagged mulch is convenient for small beds, but bulk (delivered by the cubic yard) is usually cheaper once you need more than about 2-3 cubic yards — worth a quick price check for larger jobs.

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