Mulch Cost Calculator
A mulch cost calculator adds material and labor: a 20 × 10 ft bed at 3 in deep needs 1.85 cubic yards and costs $214.81 at $35 per yard.
Mulch cost calculator formula
A mulch cost calculator adds two things, the mulch itself and the labor to spread it. Material cost = cubic yards × price per yard. Labor cost = bed area × labor rate per square foot. Total = material + labor. Starting prices are $35 per cubic yard and $0.75 per sq ft of labor. Both are placeholders.
The formula in plain words
Find the cubic yards of mulch by multiplying length, width and depth in feet and dividing by 27. Multiply the yards by the price. Separately, multiply the bed area by the labor rate. Add them.
Worked examples
These match the calculator exactly.
- One planting bed: 20 ft × 10 ft, 3 in deep
- Area: 200 sq ft
- Volume: 200 × 0.25 = 50 ft³ ÷ 27 = 1.85 yd³
- Material: 1.852 × $35 = $64.81
- Labor: 200 × $0.75 = $150.00
- Total: $214.81
- A wider area with a thinner layer: 40 ft × 15 ft, 2 in deep
- Area: 600 sq ft
- Volume: 600 × 0.1667 = 100 ft³ ÷ 27 = 3.70 yd³
- Material: 3.704 × $35 = $129.63
- Labor: 600 × $0.75 = $450.00
- Total: $579.63
In both examples labor outweighs the mulch itself. If you spread it yourself, the total falls to the material line.
How much one yard covers
| Depth | Area covered by 1 cubic yard |
|---|---|
| 1 in | 324 sq ft |
| 2 in | 162 sq ft |
| 3 in | 108 sq ft |
| 4 in | 81 sq ft |
Divide your area by the figure in the row to get the yards. A 540 sq ft bed at 3 inches needs 540 ÷ 108 = 5 yards.
Bulk or bags
A bag of mulch holds about 2 cubic feet, so a cubic yard is about 13.5 bags. At 1.85 yards, example 1 would take 25 bags. Bags are handy for small beds and for carrying through a house. For more than a couple of yards, bulk delivery by truck usually costs less per yard, though there may be a delivery fee. To see bag counts and a full list of mulch options, use the mulch calculator.
How to measure beds
Break the bed into rectangles and circles. Measure each length and width and add the areas. For a curved edge, take three or four widths along the bed and use their average. Measure the depth you want after raking, not the thickness of the pile in the truck.
Choosing a mulch and a labor rate
Shredded bark, wood chips and pine straw are sold at different prices, so the $35 per yard in the tool is only a starting point. Use the actual delivered price from the yard you will buy from. Dyed mulch and screened premium products cost more than plain chips.
The labor rate of $0.75 per sq ft is also a placeholder. A crew that edges the bed, pulls weeds and hauls the mulch in wheelbarrows may charge more than one that only dumps and spreads. Ask what is included. If you do the job yourself, set the rate to zero and the total becomes the material cost alone, $64.81 in example 1.
Topping up later
Mulch breaks down and thins out over a season or two. Most people add a thin refresh layer of an inch or so rather than a full new depth. Use the calculator with a depth of 1 and your bed area to see the yards: the 200 sq ft bed needs 200 × 0.0833 ÷ 27 = 0.62 cubic yards. That keeps the cost of a refresh in proportion.
Common mistakes
- Spreading it too deep. More than 3 or 4 inches can smother roots.
- Piling mulch against trunks, which holds moisture on the bark.
- Forgetting that the labor rate does not change with depth. This calculator charges by area, so a deeper layer has the same labor line.
- Skipping delivery fees in the price per yard.
Related pages
See the mulch calculator for bags and weight. The topsoil delivery cost calculator prices a topsoil load for the same beds.
Frequently asked questions
How much does mulch cost per cubic yard?
Prices differ by supplier and type of mulch. The tool uses $35 per cubic yard as a placeholder. Call a local landscape yard for bulk prices and delivery fees, then enter them.
How do I figure out how many yards of mulch I need?
Multiply length by width by depth in feet and divide by 27. A 20 × 10 ft bed at 3 inches deep is 200 × 0.25 ÷ 27 = 1.85 cubic yards.
How is the labor estimate calculated?
Labor is the bed area in square feet times a labor rate per sq ft. The default is $0.75, so a 200 sq ft bed adds $150. Spreading mulch yourself removes that line.
How deep should mulch be?
Most gardeners spread 2 to 3 inches around plants and keep it off the stems and tree trunks. Heavier layers can hold too much water. Fine mulch compacts, so use less of it.
Does this include a waste factor?
No. Order a little extra if the bed is uneven or if you plan to top up later, since mulch settles over a season.
Estimates only. Verify quantities with your supplier before purchasing.