Mulch Calculator

Calculate cubic yards, bags needed, total weight, and bulk vs bagged material costs for mulch, topsoil, compost, and gravel landscape projects.

Garden Bed Parameters

US Customary
Quick Project Presets
ft
ft
2–3 in for beds, 4 in for gravel
in
Total Volume Required
1.85Cubic Yards (50 cu ft)
25 Bags (2.0 cu ft)

Coverage Area

200 sq ft

Application Depth

3 Inches

Estimated Weight

1,481 lbs

Truckload Scale

0.74 Tons

Bulk vs Bagged Purchasing Cost

Save $55 in Bulk
Bulk Yard Delivery$701.85 yd³ @ $38/yd
Store Bagged Retail$12525 bags @ $5/bag

Pro Landscaping Delivery Tip

For orders exceeding 2.0 cubic yards (1.85 yd³ needed), bulk delivery is recommended to save cost and eliminate plastic bag disposal. Lay a heavy tarp on your driveway prior to truck dumping to ensure quick, clean shovel cleanup.

How to Calculate Mulch & Landscaping Material Coverage

Landscaping suppliers sell soil and mulch by the cubic yard (yd³), which represents a 3-dimensional cube measuring 3 ft × 3 ft × 3 ft (27 cubic feet). To calculate how much material you need, multiply your planting bed's surface area by the depth in feet, then divide by 27.

1. Cubic Yards Volume Formula
Cubic Yards (yd³)=
Length (ft) × Width (ft) ×
Depth (in)12
27 (Cubic Feet per Yard)
2. Retail Bag Quantity Formula
Number of Bags=
Total Volume (Cubic Feet)Bag Size (e.g. 2.0 cu ft)
;1 Cubic Yard=13.5 Bags (2 cu ft each)
Step-by-Step Calculation Breakdown
Step 1: Convert Dimensions to Bed Square Footage (20 ft × 10 ft Bed @ 3 in Depth)
Bed Area = 20 ft × 10 ft = 200 sq ft
Depth in Feet = 3 inches ÷ 12 = 0.25 ft
Step 2: Calculate Cubic Feet and Cubic Yards
Volume (ft³) = 200 sq ft × 0.25 ft = 50.00 cu ft
Volume (yd³) = 50.00 cu ft ÷ 27 = 1.85 yd³
Step 3: Determine Store Bags Needed (2.0 cu ft Bags)
Bags=50.00 cu ft ÷ 2.0 cu ft/bag=25 Bags (or ~2 yds Bulk)

Depth & Coverage Reference Table per Cubic Yard

Mulch DepthSq Ft per Cubic Yard2 Cu Ft Bag CoverageRecommended Landscape Use
1 inch (2.5 cm)324 sq ft24 sq ftAnnual spring color refresh / lawn topdressing
2 inches (5 cm)162 sq ft12 sq ftStandard flower bed maintenance & light weed barrier
3 inches (7.5 cm)108 sq ft8 sq ftNew planting beds, shrub borders & maximum moisture retention
4 inches (10 cm)81 sq ft6 sq ftWalking trails, dog runs, and playground wood chips

Landscaping Material Density & Weight Chart

MaterialWeight per Cu YdBulk Price / YdPickup Truck Capacity (½-Ton)
Bark & Wood Mulch600 – 800 lbs$35 – $452.0 – 2.5 Cubic Yards
Screened Topsoil2,000 – 2,400 lbs$30 – $400.5 – 0.75 Cubic Yards (weight limited)
Mushroom / Organic Compost1,200 – 1,400 lbs$32 – $451.0 – 1.25 Cubic Yards
Crushed Pea Gravel / Stone2,600 – 2,900 lbs$50 – $700.5 Cubic Yard (heavy load warning)

Frequently Asked Questions

How much mulch do I need for my garden?
For most flower beds and landscaping borders, a 2 to 3-inch layer is optimal. One cubic yard of mulch covers 162 square feet at 2 inches deep, or 108 square feet at 3 inches deep. A standard 2.0 cubic foot bag covers approximately 12 square feet at a 2-inch depth.
Should I buy mulch in bulk or bags?
Bulk mulch is much more economical for projects over 2 to 3 cubic yards. One cubic yard equals 13.5 bags (2 cu ft each). Buying 2 cubic yards in bulk typically costs $70–$80 delivered, whereas 27 bagged units at retail price ($4.50–$6/bag) costs $120–$160. For small garden patches under 1 yard, bags offer easier transport and cleaner storage.
What depth of mulch should I apply?
2 to 3 inches is ideal for weed suppression and moisture retention in flower beds. Never exceed 4 inches, as excessive mulch suffocates shallow root systems and encourages fungal root rot. For playgrounds and high-impact walkways, 4 to 6 inches of wood chips or rubber mulch provides proper shock absorption.
How much does a cubic yard of mulch weigh?
A cubic yard of dry shredded hardwood mulch weighs approximately 600–800 lbs (up to 1,000 lbs when soaking wet). Topsoil weighs roughly 2,000–2,400 lbs per cubic yard, compost weighs 1,200–1,400 lbs, and pea gravel weighs 2,600–2,900 lbs. Be mindful of pickup truck payload limits (standard half-ton trucks can carry ~1 yard of wet dirt or 2 yards of mulch).
How often should I replenish mulch?
Organic wood and bark mulch breaks down over 12–18 months, enriching the soil with organic matter. Apply a 1-inch top-off layer each spring to restore color, retain moisture, and prevent weed germination.

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