Decomposed Granite Coverage Chart: Tons, Yards & Square Feet

Planning an outdoor hardscape project requires knowing exactly how much surface area your ordered materials will cover. Whether you are spreading decorative rock in a desert xeriscape or rolling a firm walkway, this decomposed granite coverage chart provides verified square-foot reference rates per US short ton and per cubic yard across various installation thicknesses.

Unlike manufactured pavers or concrete slabs with rigid dimensional boundaries, decomposed granite (DG) is a bulk aggregate. Because quarries and landscape supply yards sell DG either by volume (cubic yards) or by weight (US short tons), estimating your project demands translating square footage into depth, volume, and bulk mass. Before placing an order with a local quarry, you can also test custom dimensions with our free decomposed granite calculator to ensure you account for irregular perimeters and compaction shrinkage.

Master Decomposed Granite Coverage Reference Table

The table below outlines theoretical geometric coverage rates for common finished depths. Coverage values assume an industry-standard loose bulk density of 2,800 pounds per cubic yard (1.40 US short tons per cubic yard) without compaction or handling loss adjustments.

*Note: Real-world coverage will be 10% to 25% lower if the material is heavily vibratory compacted or if the excavated subgrade is uneven.

How Many Square Feet Does One Ton of Decomposed Granite Cover?

A common question landscape supply dispatchers receive daily is: “How much area does one ton of DG cover?”

The answer depends entirely on your chosen installation thickness. At a light 2-inch decorative layer, one US ton covers approximately 116 square feet. If you are constructing a standard pedestrian pathway with a finished 3-inch compacted layer, that same ton covers roughly 77 square feet. If you increase depth to 4 inches for a driveway or heavy-duty patio, coverage drops to 58 square feet per ton.

The mathematical explanation lies in volume and weight conversions:

1. One US short ton equals exactly 2,000 pounds.
2. At a bulk density of 2,800 lbs per cubic yard, 1 ton yields 2,000 / 2,800 = 0.714 cubic yards.
3. In cubic feet: 0.714 cu yd × 27 cu ft/yd = 19.28 cubic feet of material.
4. To find coverage at 3 inches (0.25 ft): 19.28 cu ft ÷ 0.25 ft = 77.14 square feet.

For an in-depth exploration of how moisture and mineral gradation shift this density between 2,600 and 3,000 lbs, refer to our comprehensive guide on decomposed granite weight per cubic yard.

How Much Area Does One Cubic Yard of DG Cover?

Unlike weight, which fluctuates based on ambient moisture and quartz density, cubic yards measure geometric volume. One cubic yard is a cube measuring 3 feet wide by 3 feet long by 3 feet high, containing exactly 27 cubic feet.

The square foot coverage of 1 cubic yard at any depth is governed by a simple rule:

Why 324? Because 27 cubic feet × 12 inches per foot = 324. Therefore:

• At 1 inch deep: 324 ÷ 1 = 324 sq ft
• At 2 inches deep: 324 ÷ 2 = 162 sq ft
• At 3 inches deep: 324 ÷ 3 = 108 sq ft
• At 4 inches deep: 324 ÷ 4 = 81 sq ft

If your local landscape depot quotes delivery by the cubic yard, these numbers give you an exact starting threshold before accounting for compactor compaction.

Project Size Material Requirements (Tons & Yards Needed)

To make planning simple for common residential outdoor living spaces, the following reference table breaks down total volume and weight needed across standard project square footages at 2-inch, 3-inch, and 4-inch thicknesses.

Why Installed Coverage Differs from Raw Calculations

When you order aggregate, it arrives loose in a dump truck bed. During installation, you will spread it with landscape rakes, mist it with water, and run a heavy vibratory plate compactor or water-filled roller over the surface.

This physical process forces fines (stone dust) into the interstitial voids between larger angular particles. As a result:

• Volumetric Shrinkage (15%–25%): A loose 4-inch layer of natural DG typically compacts down to a dense 3-inch finished surface. If you calculated strictly for 3 inches of loose material, your finished surface would only measure 2.25 inches thick.
• Subgrade Irregularities: Soil excavation rarely produces a perfectly laser-flat subgrade. Minor low spots in your soil base consume additional granite, easily reducing actual surface coverage by another 5% to 10%.
• Edge Loss: Without rigid bender board or aluminum landscape edging, material near the boundaries migrates into adjacent lawn beds during compaction.

To ensure you do not run short mid-project, professional landscape contractors order an extra 10% to 15% allowance for walkways and patios. You can configure exact compaction percentages when you estimate decomposed granite quantities with our browser calculator.

Matching Depth to Project Application

Never select a thinner depth solely to stretch your budget over more square feet. Decomposed granite requires critical mass to interlock:

Bagged DG Coverage vs. Bulk Delivery

For minor patch repairs, small urban courtyards, or sites with zero truck access, retail home improvement stores sell decomposed granite in 50-pound plastic bags or 0.5-cubic-foot bags.

Here is how bag coverage translates into real square footage:

• One 50 lb Bag: Covers approximately 1.92 sq ft at 3 inches deep (or 2.88 sq ft at 2 inches deep).
• One 0.5 cu ft Bag: Covers exactly 2.00 sq ft at 3 inches deep (or 3.00 sq ft at 2 inches deep).
• One Ton Equivalent: It takes 40 fifty-pound bags to equal one single US short ton.
• One Yard Equivalent: It takes 54 half-cubic-foot bags to match one single cubic yard.

Buying aggregate in bags typically costs 3x to 4x more per ton than bulk delivery from a commercial materials yard. Before buying bags, review our comprehensive price guide on decomposed granite cost per ton and yard to weigh delivery fees against bulk volume savings.

Frequently Asked Questions About Decomposed Granite Coverage