Garden Tool
Mulch Calculator
Calculate how much mulch you need for your garden beds. Enter the area dimensions and desired depth to get instant results.
Mulch Needed
1.85cubic yards
Coverage Area200 sq ft
Cubic Feet50 cu ft
2 cu ft Bags25 bags
Garden Tool
Calculate how much mulch you need for your garden beds. Enter the area dimensions and desired depth to get instant results.
Mulch Needed
1.85cubic yards
Mulch is a protective layer spread over soil in garden beds. It retains moisture, suppresses weeds, and regulates soil temperature. The Mulch Calculator tells you how much mulch (in cubic yards, cubic feet, or bags) you need based on the area you want to cover and the depth you desire.
Enter the length and width of your garden bed in feet, then specify the desired mulch depth in inches. The calculator multiplies length by width to find area in square feet, converts depth to feet, calculates volume in cubic feet and cubic yards, and shows how many 2-cubic-foot bags you'll need to purchase.
Volume (cu ft) = Area (sq ft) × Depth (ft); Cubic Yards = Cubic Feet ÷ 27; Bags (2 cu ft each) = Cubic Feet ÷ 2Area is length times width in square feet. Depth is converted from inches to feet (divide by 12). Multiply area by depth to get cubic feet. Divide cubic feet by 27 to convert to cubic yards (standard landscaping unit). Divide cubic feet by 2 to find the number of 2-cubic-foot bags.
| Input | Result | Notes |
|---|---|---|
| Rectangular bed 20 ft × 10 ft, 3 inches deep | 18.52 cubic yards | Area = 200 sq ft; Depth = 0.25 ft; Volume = 50 cu ft = 1.85 cu yd; Need 25 bags (2 cu ft each) |
| Small bed 8 ft × 6 ft, 4 inches deep | 0.79 cubic yards | Area = 48 sq ft; Depth = 0.33 ft; Volume = 16 cu ft = 0.59 cu yd; Need 8 bags |
| Large garden 30 ft × 20 ft, 2 inches deep | 44.44 cubic yards | Area = 600 sq ft; Depth = 0.167 ft; Volume = 100 cu ft = 3.7 cu yd; Need 50 bags |
Standard mulch depth is 2–4 inches. Use 2 inches for pathways, 3–4 inches for planting beds to suppress weeds and retain moisture. Deeper mulch can sometimes promote rot in woody plants.
A cubic yard is 27 cubic feet, or a 3×3×3 foot cube. It's the standard unit for bulk mulch and soil sales. One cubic yard covers about 100 square feet at 3 inches deep.
Most bags contain 2 cubic feet. Divide your total cubic feet by 2. For example, 50 cubic feet ÷ 2 = 25 bags. Always round up to avoid shortages.
Bulk is cheaper per cubic yard but requires delivery. Bags are pricier but flexible if you have a small area or no delivery option. Use this calculator to compare costs.
Yes. Mulch compacts and settles, especially within the first few weeks. Add 5–10% extra to account for settling and uneven distribution during spreading.
Common types include wood chips, shredded bark, straw, pine needles, and rubber mulch. This calculator works for any type by volume; choose based on your garden needs.