How Many Bags of Mulch Do I Need?
Calculate exact bags or cubic yards of mulch and topsoil for your garden beds and landscaping projects.
Preparing Your Garden
A fresh layer of mulch does more than just look good—it suppresses weeds and helps your soil retain moisture. But ordering 10 bags more than you need is a back-breaking mistake.
How Deep Should Mulch Be?
- New Beds: Aim for 3 inches of mulch for maximum weed suppression.
- Refresh / Annual Topping: 1 to 2 inches is usually enough if you already have a decent base.
- Topsoil: If you are filling a new raised bed, you'll need significantly more depth (usually 6-12 inches).
Mulch & Dirt Estimator
Use the tool below to calculate your volume. It even tells you how many bags to buy if you aren't ordering in bulk.
Bulk vs. Bags
As a general rule, there are 27 cubic feet in 1 cubic yard. If you are buying standard 2.0 cubic foot bags from a big-box store, you'll need about 14 bags to equal one cubic yard of material.
Pro Tip
If your project requires more than 2 or 3 cubic yards, it is almost always cheaper to have it delivered in bulk rather than buying individual bags.
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