Mulch calculator for Minnesota
Plan every garden bed with yard and bag totals, along with depth advice for healthy plants.
Enter your project dimensions
One cubic yard equals 27 cubic feet. Since garden-center bags hold 2 cubic feet, that is exactly 13.5 bags. Enter the dimensions and depth of your beds below to see the bulk cubic-yard amount and its bag equivalent for comparison before shopping. Shredded hardwood is light at around 600 lb per yard, so mulch is sold by volume, and bulk delivery is based on volume rather than weight.
Figure mulch for your beds
- Add together the foot measurements for all beds. If a bed is round, take its diameter and use circle mode for the area.
- Use 2 inches to renew an existing mulch layer and 3 inches on fresh or uncovered beds. Roots can begin to lose air when the layer goes beyond 4 inches.
- Use the answer for both buying options: it gives bulk volume in cubic yards and compares it with store bags using 13.5 bags per yard.
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 sizes
| 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 |
Bulk and bags: comparing costs
Ten bags marks the usual break point: bags are handy below that amount, while bulk is less expensive in most places above it. Free delivery eliminates the need to rent a truck. Hauling 15 bags home can make a single delivered yard, covered with a tarp until needed, the simpler choice.
Plant-safe depth guidance
- After loosening last year's mulch with a rake, add 2 inches over it.
- For uncovered ground, apply 3 inches. This depth suppresses weed seeds and helps retain moisture through July.
- Leave a mulch-free space 3-6 inches wide around each trunk. Bark may rot and rodents can shelter there when mulch touches it. Form a level donut shape, not a volcano.
- Do not exceed 4 inches in any location. Roots can be deprived of air by a wet layer that is too deep.
- Use playground-certified chip, not landscape shred, because playground surfacing needs at least 6 inches of depth.
Select a mulch type
This calculator begins with shredded hardwood, which binds together and is less likely to move on mild slopes. Chips and nuggets may remain usable a season or two longer, but a hard rain can send them floating and scattered. Dyed mulch keeps its color longer while decomposing more slowly. Quantity is calculated the same way for every type, so material choice affects appearance and refresh timing, not volume ordered.
Preparing for delivery
Three yards forms a small-car-sized pile. Before it arrives, open up a parking spot of driveway and lay down a tarp, since fresh concrete can be stained by shredded mulch. Get the pile spread in a week or two. If a large pile sits for a month, it can heat in the middle and sour. Allow 30 to 45 minutes of wheelbarrow work for each yard, then reserve the half-yard for those forgotten beds behind the garage.
Common mulch calculation questions
How many mulch bags equal a cubic yard?
How many cubic feet make up a yard of mulch?
How much mulch is required?
What area does a yard of mulch cover?
What is the weight of a yard of mulch?
What does a yard of mulch cost?
Will mulch bring in termites?
Can fresh mulch go over old mulch?
Other calculators
Avoid filling a 27-bag cart.
Order bulk shredded hardwood by the yard for free driveway delivery.
