Mulch calculator
Calculate how much mulch a garden bed or landscape area needs, in bags or cubic yards.
Mulch calculator
Calculate how much mulch a garden bed or landscape area needs, in bags or cubic yards.
Enter your dimensions to see the mulch estimate.
Volume needed
Project summary
How it works
These are volume estimates for planning. Actual mulch requirements depend on ground conditions, compaction and how the material settles.
Mulch calculator
Depth is the number that changes everything
Two inches of mulch is enough for most flower beds and garden paths. Three inches is the standard for tree rings and shrub beds. Four inches is common for new beds where weed suppression is the priority. The difference between 2 and 4 inches is exactly double the material, so picking the right depth before you measure saves you from buying twice what you need or coming up short.
Bags versus bulk
Bagged mulch is sold in 1, 1.5 or 2 cubic foot bags and is the practical choice for small beds, front yards where a truck cannot dump, and jobs where you spread as you go. Bulk mulch is sold by the cubic yard and delivered by the truckload. A cubic yard is 27 cubic feet, so it takes 27 one-cubic-foot bags to equal one yard. The crossover is usually somewhere around 3 to 5 cubic yards, depending on the delivery fee.
Mulch settles and decomposes
Fresh mulch is fluffy when it goes down and compacts under its own weight and rainfall. Over time it decomposes, especially hardwood and dyed mulches. This means the 3 inches you spread today may look like 2 inches in six months. It also means the top-up you need next year is less than the first application. A 10 percent waste allowance covers spillage and uneven spreading; beyond that, the depth you choose is the depth you get.
Frequently asked questions
How many bags of mulch equal a cubic yard?
Twenty-seven 1-cubic-foot bags make one cubic yard. For 2-cubic-foot bags, it takes 13.5 bags, which you would round up to 14. For 1.5-cubic-foot bags, 18 bags. Enter your own bag size and area above.
How deep should mulch be?
2 inches for paths and established flower beds, 3 inches for shrub beds and tree rings, and 4 inches for new beds or areas where weed suppression is important. Going deeper than 4 inches can trap too much moisture against plant stems and roots, which causes problems rather than preventing them.
How many cubic yards of mulch do I need for 1000 square feet?
At 2 inches deep, you need about 0.6 cubic yards. At 3 inches deep, you need about 0.9 cubic yards. The calculator gives you the exact amount based on your area and depth.
How much does a cubic yard of mulch cost?
Bulk mulch costs 30 to 50 dollars per cubic yard delivered. Bagged mulch costs more per cubic yard. The calculator shows cubic yards so you can price both options.
How deep should I spread mulch?
2 to 3 inches is standard for garden beds. 1 to 2 inches for new plantings. More than 4 inches can trap too much moisture and harm plants. The calculator lets you choose the depth.
How many bags of mulch per cubic yard?
Most mulch bags are 2 cubic feet. There are 27 cubic feet in a cubic yard, so you need 14 bags to equal one cubic yard. The calculator converts between bags and cubic yards.
What type of mulch is best?
Hardwood mulch is affordable and decomposes to improve soil. Cedar and cypress resist insects. Rubber mulch lasts longer but does not improve soil. The calculator estimates volume regardless of type.
How often should I refresh mulch?
Organic mulch decomposes and should be refreshed or replaced annually. Top up thin areas each spring. The calculator helps you estimate the volume for annual maintenance.