Mulch calculator for Rhode Island
Plan mulch amounts for every landscape bed, with depth advice for healthy plants.
Enter your project dimensions
One cubic yard holds 27 cubic feet. That equals exactly 13.5 bags sized at 2 cubic feet, like those at a garden center. This conversion does most of the work on this page. Add your bed dimensions and selected depth to see the bulk cubic-yard total and its bag equivalent, making a store comparison easier. Shredded hardwood is light at around 600 lb per yard, so mulch is priced by volume and bulk delivery is not based on weight.
Figure mulch for your garden beds
- Add together the square footage of all beds after measuring them in feet. For circular beds, take the diameter and use circle mode to calculate the area.
- Select 2 inches when renewing an existing layer, or 3 inches for a new bed or exposed soil. Roots can lose air once the layer exceeds 4 inches.
- Your answer appears as cubic yards for a bulk purchase and as bags, using 13.5 per yard, for comparison shopping.
Bags (2 cu ft) = cubic yards × 13.5
Coverage by depth
| Depth | 1 cubic yard covers | 10 bags (2 cu ft) cover |
|---|---|---|
| 1 inch | 324 sq ft | 240 sq ft |
| 2 inches | 162 sq ft | 120 sq ft |
| 3 inches | 108 sq ft | 80 sq ft |
| 4 inches | 81 sq ft | 60 sq ft |
Common order amounts
| Project | Typical size | Depth | Cubic yards | ≈ Bags |
|---|---|---|---|---|
| Foundation beds along the house | 40 x 3 ft | 3" | 1.1 yd³ | 15 bags |
| Four tree rings | 4 ft across each | 3" | 0.5 yd³ | 6 bags |
| All beds, average yard | ≈ 500 sq ft | 3" | 4.6 yd³ | 63 bags |
| Annual refresh of the same beds | ≈ 500 sq ft | 1.5" | 2.3 yd³ | 31 bags |
| Playground surface | 15 x 15 ft | 6" | 4.2 yd³ | 56 bags |
Comparing bulk mulch and bags
Ten bags marks the point where the choice changes. Bags are handy below that amount. Once you need more, bulk is usually the lower-cost option, and free delivery eliminates the reason to rent a truck. Each spring, we bring yard quantities to people who took 15 bags home the previous weekend, then compared costs in the parking lot. Get one yard delivered, tarp any remaining mulch, and you are done.
Mulch depths for plant care
- After raking loose last year's mulch, add 2 inches over it.
- Use 3 inches on uncovered soil. This helps prevent weed germination and retain moisture during July.
- Leave an open ring 3 to 6 inches from a tree trunk. Bark can rot and rodents may be drawn in when mulch rests against it. Keep the mulch shaped like a flat donut rather than a volcano.
- Do not exceed 4 inches in any area. Mulch that is too deep and wet deprives roots of air.
- Choose playground-certified chips for play areas, not landscape shred, and install them 6 inches deep at minimum.
Selecting mulch material
This calculator starts with shredded hardwood. Its fibers knit together, helping it remain in place on light slopes. Chips and nuggets can outlast it by one or two seasons, but a downpour may float and scatter them. Dyed mulch keeps its color while breaking down more slowly. All types use the same volume calculation, so the quantity you order stays the same. Only the appearance and refresh schedule vary.
Preparing for delivery
A load of three yards makes a pile roughly the size of a small car. Open up a parking-space-sized area of driveway and ask for the mulch to be placed on a tarp, since shredded mulch can stain new concrete. Put it out within a week or two. A pile sitting for a month can heat internally and turn sour. Plan on 30 to 45 minutes of wheelbarrow work for every yard, and reserve the final half-yard for overlooked beds around the property.
Common mulch calculation questions
What bag count equals a cubic yard of mulch?
What is the cubic-foot volume of a mulch yard?
How much mulch is required?
What square footage can one yard of mulch cover?
What does one cubic yard of mulch weigh?
What is the price for a yard of mulch?
Will mulch draw termites?
Is it okay to add mulch over an old layer?
Other calculators
Choose bulk instead of a 27-bag cart.
Order bulk shredded hardwood by the yard for driveway placement, with free delivery.
