Decomposed Granite Calculator

Planning a hardscaping project requires accurate material volumes from day one. Whether you are cutting a winding pathway through a garden, building a backyard entertainment patio, top-dressing a rustic driveway, or applying low-maintenance xeriscape ground cover, calculating your bulk materials precisely protects your project timeline and budget.

Misjudging material counts causes immediate bottlenecks on a job site. Under-ordering leaves you with an unfinished layout exposed to soil erosion, while forcing you to pay premium freight surcharges for a small secondary delivery to make up the difference. Over-ordering leaves an unneeded mountain of aggregate stone on your driveway that clogs drainage lines and demands extra physical labor or machine rentals to clear away.

This online decomposed granite calculator functions as your material estimator and cost calculator. It instantly converts your measurements into an itemized purchasing list of bulk cubic yards, short tons, retail bag counts, and local cost projections.

• Masonry & Hardscape Safety Disclaimer: Working with landscape aggregates carries personal hazards. Decomposed granite is heavy and can cause muscle strain if lifted improperly. Always bend at your knees and keep your spine straight. Additionally, silica dust from handling or cutting stone damages lungs. Always protect yourself on site by wearing an approved N95 dust mask, heavy leather work gloves, and safety glasses.

Decomposed granite, commonly known as DG, is a natural landscape aggregate formed from the gradual weathering and erosion of solid granite rock. Unlike standard crushed stone or gravel, which consists of clean, uniform rock fragments, DG is a raw mixture of tiny, fractured granite flecks ($1/4\text{-inch minus}$ or smaller) combined with fine rock particles and stone dust.

This combination of angular rock pieces and fine dust allows DG to function exceptionally well for structural and decorative hardscaping. When spread and compressed with a mechanical plate tamper or heavy roller, the fine stone dust completely packs the open spaces between the larger granite flecks. The pieces lock together to form a highly dense, stable surface that resists heavy foot traffic and light vehicle tracking.

Despite its tight compaction density, DG remains a highly permeable landscape material. Rainwater does not pool on top of a properly graded surface; instead, it drains straight down through the natural stone fractures into the earth below, making it an eco-friendly option for erosion control and zero-water xeriscaping.

Decomposed Granite vs. Gravel

Our web tool computes site specifications instantly using standard US Imperial units as the default, while offering Metric conversions for international build sites. To generate an accurate material estimate, follow these steps:

• Enter Your Project Footprint: Enter your project footprint by entering the length and width of the coverage area to calculate square footage and material volume accurately.
• Specify the Intended Depth: Choose how thick your compressed material layer needs to stand (typically 2 to 4 inches depending on the application).
• Select Your Processing Mode: Choose whether you will install raw, natural loose DG or a heavy-duty stabilized mix.
• Choose Material Packaging: Toggle between a commercial bulk dump truck delivery quote or individual retail packaged bag counts.
• Input Regional Unit Prices: Type in local retail prices per bag, bulk costs per yard, or your supplier's exact decomposed granite price per ton metrics alongside delivery freight surcharges to generate an automated project cost total.

If you prefer to audit your numbers by hand while standing in the field, you can determine your project's volume requirements using basic three-dimensional geometry:

To determine the cubic volume, convert your target layer thickness from inches to decimal feet by dividing by 12:

Now, multiply your flat surface area by your depth in feet to find the total cubic feet:

Because commercial stone yards, wholesale quarries, and landscape suppliers invoice and load bulk aggregates by volume, you must translate your cubic feet into standard cubic yards. There are exactly 27 cubic feet in a single cubic yard ($3\text{ ft} \times 3\text{ ft} \times 3\text{ ft}$). Divide your total cubic foot calculation by 27 to find your total volumetric ordering requirement:

While dispatch desks track inventory by volume, delivery trucks and quarry scales manage payloads strictly by weight. To bridge this gap, multiply your cubic yards by the material's bulk density rating.

Decomposed granite is exceptionally heavy because the stone dust fills every internal void. A single cubic yard of loose dry DG weighs approximately 3,000 pounds ($1.5\text{ short tons}$). To find your total order weight, multiply your calculated volume by this standard density factor:

Always include a mandatory 10% to 15% compaction and waste factor multiplier ($1.10\text{ to }1.15$) to your final order. When you run a heavy plate tamper over loose DG, the air pockets collapse, causing the material layer to compress down by up to $15\%$ of its initial uncompacted height.

To run broader material comparisons across different branches of your landscape overhaul, run your dimensions through our standalone Gravel Calculator, Stone Calculator, Landscape Rock Calculator, Material Calculator, or Cubic Yard Calculator.

This guide tracks how many cubic yards and tons are required to fill a standard 100-square-foot surface footprint at varying target depths, incorporating a standard $10\%$ waste allowance.

Sourcing aggregates involves balancing material costs against transit logistics and field labor. Prices vary significantly depending on geological abundance, transportation fuel markets, and local quarry proximity. Always confirm pricing with a local aggregate supplier before finalizing your project budget.

Regional pricing varies significantly across the United States. States with abundant local quarries such as Arizona, California, and Texas often have lower decomposed granite costs due to reduced transportation distances and freight charges.

Material Sourcing Unit Costs

Unit Cost Breakdowns

• Decomposed Granite Price Per Ton: Sourcing basic natural aggregate at a commercial quarry gate averages $40 to $80 per ton for raw material alone. Vibrant golds or pinks carry a premium over standard gray or tan.
• Decomposed Granite Price Per Yard: If your supplier invoices strictly by volume, expect a loose decomposed granite price per yard ranging from $60 to $120 for natural material, and up to $250 to $330 per cubic yard for pre-blended stabilized aggregates.
• Decomposed Granite Cost Per Square Foot: Translating raw materials into a flat unit coverage line across a standard 3-inch depth profile yields a net decomposed granite cost per square foot material baseline of $0.60 to $1.20 for natural stone, and $2.25 to $3.50 for stabilized mixes.

Choosing how your raw stone aggregate is processed dictates its long-term durability, structural resistance to rain erosion, and ongoing maintenance requirements.

Decomposed granite's versatility allows it to function beautifully across varying residential and commercial design blueprints.

• DG Pathways: DG is the premier choice for rustic walking trails, public park loops, and garden pathways. A compacted 3-inch layer provides a completely stable, smooth surface that handles wheelchairs and strollers gracefully while maintaining a soft, natural aesthetic.
• DG Patios: Building an outdoor patio with DG creates an inviting, texture-rich entertainment zone. It drains rainwater immediately, allowing you to position heavy patio furniture and fire pits safely without worrying about pooling water or cracked concrete joints.
• DG Driveways: When deep-layered across an aggregate subgrade at a full 4-to-6-inch thickness profile, a stabilized or resin-coated DG driveway can easily support daily vehicle traffic without developing deep tire ruts or washboard corrugations.
• DG Landscaping: Homeowners use loose natural DG as an elegant alternative to traditional organic wood mulch. It suppresses weeds, provides crisp color framing, handles intense summer sun without fading, and acts as an excellent thermal barrier to protect plant roots.

Because stone aggregates are exceptionally heavy, transportation freight fees form a massive segment of your final invoice. Commercial quarries and landscape supply yards charge a flat decomposed granite delivery cost ranging from $50 to $150 per trip for jobs located within a standard local operating radius.

• Markdown

Small Local Pickups Partial Truck Deliveries Commercial Dump Truck

0.5 to 1.0 Ton Maximum 2.0 to 7.0 Tons Loaded 15.0 to 18.0 Tons Maximum

Loaded via loader bucket Triggers split-load fees Triggers wholesale price breaks

Requires heavy-duty suspension +$50-$100 delivery upcharge Requires solid truck clearance

Commercial dump trucks thrive on volume; buying material by the full truckload (15 to 18 tons) triggers wholesale price cuts on your material invoice, whereas ordering small, partial loads under 3 tons frequently incurs "split-load" freight penalties.

Hiring a licensed landscape or hardscape contractor to excavate, grade, frame, and mechanically compact your driving or walking surface adds a professional labor fee to your total material budget. On average, a turn-key professional decomposed granite installation cost project ranges from $4.00 to $10.00 per square foot, depending on your existing soil conditions and layout accessibility.

Professional Labor and Equipment Breakdown

• Site Preparation & Excavation: Shoveling out lawn turf, stripping soft topsoil down to a firm subgrade, and hauling away debris runs $1.50 to $3.50 per square foot.
• Edge Restraint Installation: Setting up rigid bender boards, galvanized steel edging, or pressure-treated timber stakes to pin the DG firmly in position runs $2.00 to $5.00 per linear foot.
• Spreading, Mist-Curing, and Compaction Labor: Spreading out the stone fines in thin 2-inch lifts, misting with water to activate binders, and running a mechanical plate compactor over the area costs $2.00 to $4.50 per square foot.

Let's explore three typical residential projects to see how space dimensions translate into precise budgets, material tonnages, and ordering lists.

Example 1: Winding Backyard Garden Pathway

• Project Profile: Building a clean, smooth walking path through a backyard garden zone using stabilized material.
• Dimensions: 33 feet long by 3 feet wide standard walking track ($100\text{ sq ft}$ area footprint).
• Target Compressed Thickness: 3 inches of material.
• Calculation Workflow:

• Shopping List: Order a bulk delivery load of 1.6 Tons of stabilized tan DG.

Example 2: Fire Pit Gathering Patio

• Project Profile: Grading out a high-traction outdoor entertainment patio to hold furniture and a heavy stone fire pit ring.
• Dimensions: A rectangular structural base frame layout measuring 20 feet long by 10 feet wide ($200\text{ sq ft}$ area footprint).
• Target Compressed Thickness: 3 inches of material.
• Calculation Workflow:

• Shopping List: Place a material order for 3.2 Tons of pre-blended stabilized aggregate stone.

Example 3: Expansive Vehicle Turnaround Driveway Apron

• Project Profile: Laying a heavy-duty, high-compaction parking apron to support passenger cars and light trucks without settling into soft underlying mud.
• Dimensions: A broad parking field measuring 50 feet long by 10 feet wide ($500\text{ sq ft}$ area footprint).
• Target Compressed Thickness: A deep 4-inch layer profile laid over a solid crushed limestone base course.
• Calculation Workflow:

• Shopping List: Contact your local quarry dispatch desk to schedule a bulk freight shipment for 10.7 Tons of material.

• Always Include a 10% to 15% Compaction Buffer: Never buy the exact volume your measurements state on paper. Because DG contains stone dust fines designed to pack tightly into internal voids, running a heavy mechanical plate compactor compresses loose material significantly. Ordering raw dimensions without a compaction buffer guarantees your finished layer height will fall short. Add a $15\%$ material cushion to all patio and pathway orders.
• Install Rigid, Heavy-Duty Edge Restraints: Because decomposed granite consists of loose stone fines, it will naturally spread outward, bleed into lawn turf, or crumble away along its perimeter over time if it isn't contained. Secure your project's perimeter borders with heavy-duty commercial bender boards, galvanized steel landscape edging, or thick timber stakes driven firmly into the gravel sub-base to lock your hardscape design tightly in place.
• Compact the Material in Thin 2-Inch Lifts: Attempting to dump a full 4-inch layer of loose DG into a trench and compact it all at once is a major structural error. A mechanical plate tamper can only force air bubbles out of the top two inches of material, leaving the bottom layers loose and spongy. Spread your material out in thin, consistent 2-inch layers (lifts). Mist each lift lightly with a garden hose, run your compactor over it until it is rock-solid, then apply your secondary material lift.
• Use a Dedicated Converter for Retail Store Purchases: If your project requires small quantities to fill a tight garden container or repair a minor path washout, you can look up pre-packaged pricing schedules using a retail store engine like a home depot decomposed granite calculator script. If your total material volume demands cross over 1.5 cubic yards, move immediately to a bulk quarry truck shipment to eliminate steep retail packaging markups.

What is decomposed granite?

Decomposed granite (DG) is weathered granite mixed with stone fines that compact into a stable, permeable surface commonly used for pathways, patios, and driveways.

How to calculate decomposed granite volume and weight?

To find your required decomposed granite, multiply your project footprint's length by its width to find the square footage. Multiply that square footage by your target depth layer in feet to find total cubic feet. Divide by 27 to find total cubic yards, then multiply by 1.5 to calculate the final required weight in short tons.

How much does 1 ton of decomposed granite cover?

One ton of decomposed granite typically covers approximately 80-90 square feet at 2 inches deep or 55-60 square feet at 3 inches deep.

What depth of decomposed granite is best?

Use 2-3 inches for pathways and patios and 4-6 inches for driveways or high-traffic areas.

How much does 1 ton of decomposed granite cover?

A single short ton (2,000 pounds) of standard decomposed granite covers approximately 80 to 90 square feet of surface area when spread out at a standard compacted depth of 2 inches. If you increase your project's layer thickness to a deep 3-inch patio base, one ton will cover roughly 55 to 60 square feet.

What thickness or depth should decomposed granite be?

For casual decorative landscape mulch or weed suppression blankets, a depth of 1 to 2 inches is standard. Residential walking paths and backyard patios require a compacted depth of 3 to 4 inches, while heavy-traffic vehicle driveways demand a full 4 to 6 inches of deep material over a compacted aggregate base.

How much does decomposed granite cost on average?

Raw bulk natural decomposed granite averages $40 to $80 per ton at the quarry gate, while pre-blended stabilized paving mixes cost between $150 and $220 per ton. Commercial dump truck freight delivery typically adds a flat logistics charge of $50 to $150 per truckload to your final invoice.

Is stabilized decomposed granite worth the extra cost?

Yes, stabilized decomposed granite is worth the extra investment for paths, patios, and driveways. Pre-blended organic stabilizers glue the granite aggregate fines together, creating a durable, pavement-like surface that permanently resists rain washouts, weed growth, footprint indentations, and mud tracking.