Beds, borders, and landscape areas
Mulch Calculator - Cubic Yards
Estimate bulk mulch, 2 cubic foot bags, coverage area, cost, and overage for wood chips, shredded bark, or rubber mulch.
Calculate Mulch
How Deep Should Mulch Be
Use 2 inches for refreshing existing beds, 3 inches for most new beds, and 4 inches for coarse mulch or weed control. Keep mulch away from trunks, stems, and siding so moisture does not collect against sensitive surfaces.
Bulk vs Bags Cost Comparison
Bulk mulch usually wins when the project is several cubic yards or more. Bags make sense for small beds, touch ups, and homes where a delivery pile would be difficult to place.
Coverage Reference Table
| Depth | Coverage per cubic yard |
|---|---|
| 2 inches | 162 sq ft |
| 3 inches | 108 sq ft |
| 4 inches | 81 sq ft |
Quick answer: Multiply bed length x width x mulch depth in feet and divide by 27. A 200 sq ft bed at 3 inches deep needs (200 x 0.25) / 27 = 1.85 cubic yards - about 25 bags of 2 cu ft mulch, or 27 to 28 bags with 10 percent overage.
Mulch Bags Per Cubic Yard by Bag Size
One cubic yard equals 27 cubic feet. Divide 27 by the bag size to get bags per yard:
| Bag size | Bags per cubic yard | Round up to |
|---|---|---|
| 1 cu ft | 27 | 27 |
| 1.5 cu ft | 18 | 18 |
| 2 cu ft | 13.5 | 14 |
| 3 cu ft | 9 | 9 |
How Many Wheelbarrows of Mulch Per Yard
A standard 6 cubic foot wheelbarrow holds about 0.22 cubic yards, so one cubic yard is roughly 4 to 5 heaped wheelbarrow loads. For a 3-yard delivery, plan on 12 to 15 trips from the pile to the beds.
Bulk vs Bagged Mulch: The Real Math
Bulk mulch is usually cheaper once you pass about 2 to 3 cubic yards. A yard of bulk hardwood mulch often costs less than the 14 bags of 2 cu ft mulch that equal the same volume, and you skip hauling dozens of plastic bags. Bags win for small beds under 100 sq ft, touch-ups, and homes where a delivery truck cannot reach. If delivery has a minimum (often 1 to 3 yards) or a delivery fee, compare the all-in totals before deciding.
Common Mulch Estimating Mistakes
Mulching too deep. More than 4 inches total can suffocate roots and hold moisture against trunks. Measure existing mulch before adding more.
Forgetting bed edges. Mulch migrates onto lawns and paths. A small overage covers the thin spots that appear after the first rain.
Ordering by bags for big beds. A 1,000 sq ft bed at 3 inches needs 9.26 yards - that is 125 bags of 2 cu ft mulch. Bulk delivery is the sane choice.
FAQ
Multiply bed length by width by mulch depth in feet, then divide by 27. A 3 inch depth is 0.25 feet.
Most beds use 2 to 3 inches of mulch. Use 4 inches only where extra weed control or moisture protection is needed.
There are 13.5 bags of 2 cubic feet in 1 cubic yard. Round up to 14 bags for ordering.
Bulk mulch is often cheaper for larger areas. Bags are convenient for small beds, repairs, and areas without easy delivery access.
Mulch is much lighter than stone or soil and is often about 800 lbs per cubic yard. Wet mulch can weigh more.
If old mulch is too thick, pull some back before adding more. A total depth over 4 inches can hold too much moisture around plants.
Organic mulch usually needs refreshing every year or two. Color, breakdown, and bed depth determine timing.
A small overage is helpful for settling and thin spots. Ten percent extra is a practical planning estimate.
At 3 inches deep, 100 sq ft needs about 0.93 cubic yards, or roughly 13 bags of 2 cu ft mulch. Round up to 14 bags, or 15 to 16 with overage.
13.5 bags, so round up to 14 for ordering. With 10 percent overage, plan on 15 bags per cubic yard.
One cubic yard covers about 162 square feet at 2 inches deep. At 3 inches it covers 108 square feet, and at 4 inches it covers 81 square feet.
Yes for volume - a cubic yard is a cubic yard. Rubber mulch is heavier per yard though, so check weight limits if you are hauling it yourself.
A full-size pickup bed holds roughly 2 to 3 cubic yards of mulch heaped. Mulch is light, so volume fills the bed before weight becomes an issue.
It helps with weeds initially but can block water and air over time, and mulch breaks down into soil above it anyway. Many gardeners skip fabric in planting beds and just maintain proper depth.