Gravel Driveway: How Much Gravel Do I Need?

How Much Gravel for a Driveway

A proper gravel driveway uses three layers: a base layer of large crushed stone (4-6 inches), a middle layer of medium stone (4 inches), and a surface layer of fine gravel (2-4 inches). Total depth: 10-14 inches.

To calculate volume: Length (ft) × Width (ft) × Depth (ft) ÷ 27 = cubic yards. Gravel weighs approximately 1.4 tons per cubic yard.

Example: a 40-foot long, 12-foot wide driveway at 12 inches total depth needs: 40 × 12 × 1 ÷ 27 = 17.8 cubic yards, or about 25 tons of gravel across all three layers.

Gravel Types and Layer System

Base layer (4-6 inches): use #3 crushed stone (1-2 inch diameter). This provides structural support and drainage. It is the foundation that prevents your driveway from sinking into soft ground.

Middle layer (4 inches): use #57 stone (3/4 to 1 inch). This transitional layer fills gaps in the base and provides additional stability. It also aids drainage.

Surface layer (2-4 inches): use #411 gravel, pea gravel, or crusher run (fine gravel with dust). This creates the smooth driving surface. Crusher run packs down best and resists scattering.

For a simple, budget driveway, you can skip the middle layer and use just a 6-inch base layer topped with 3-4 inches of surface gravel.

Gravel Driveway Costs

Gravel materials cost $15-$50 per ton depending on type and region. Crushed limestone and recycled concrete are the most affordable at $15-$25 per ton. Decorative gravels cost $30-$50 per ton.

Delivery fees range from $50-$200 per load depending on distance and quantity. Most suppliers deliver 10-20 tons per truckload. Ordering full loads minimises per-ton delivery cost.

Professional installation (grading, compacting, edging) costs $2-$5 per square foot on top of materials. A 480 sq ft driveway (40×12) costs roughly $1,500-$3,500 total for a complete three-layer installation.

DIY installation can reduce costs by 40-60% if you have access to a plate compactor (available at equipment rental shops for $80-$150 per day) and are comfortable operating one.

Maintenance Tips

Rake and redistribute surface gravel every 6-12 months. Vehicle tyres gradually push gravel to the edges, creating ruts in the centre. Regular raking prevents deep rut formation.

Add a fresh 1-2 inch top layer of surface gravel every 2-3 years. This is the most common ongoing cost, typically $200-$500 per application for a standard driveway.

Install proper drainage alongside the driveway. Without drainage, water washes away gravel and erodes the base. French drains or simple swales along the edges prevent this.

Consider fabric underlayment beneath the base layer if your soil is soft clay. Geotextile fabric prevents the base stone from sinking into the ground, dramatically extending the driveway lifespan.

Gravel Driveway Cost Per Square Foot and Per Ton

Gravel is one of the most affordable driveway surfaces. Material costs commonly run from about $15 to $75 per ton depending on the stone type and your distance from the quarry, with crushed stone and pea gravel at the higher end and basic crushed run at the lower end. Delivery adds a flat haul fee that makes larger orders cheaper per ton.

On a square-foot basis, a new gravel driveway including base and surface layers typically lands around $1 to $3 per square foot for a DIY installation, and $2 to $5 per square foot installed by a contractor with grading and compaction. That is a fraction of the cost of asphalt or concrete.

A useful planning figure: one ton of gravel covers roughly 100 square feet at 2 inches deep. A two-car driveway of about 600 square feet, built in three 2-inch layers, needs in the neighborhood of 18 tons of material across all layers.

Preparing the Base for a Driveway That Lasts

A gravel driveway is only as good as its base. Start by stripping topsoil and organic material, which would otherwise trap water and cause ruts. Grade the subgrade with a slight crown or slope so water sheds to the sides rather than pooling in the center.

Laying a geotextile fabric over the subgrade is cheap insurance: it keeps the stone from sinking into the soil and dramatically reduces rutting and the need for top-ups. Over the fabric, build up in layers, compacting each layer before adding the next.

The classic three-layer system uses larger angular stone at the bottom for drainage and strength, a middle binding layer, and a finer surface stone on top for a smooth drive. Angular crushed stone locks together far better than smooth round gravel, which tends to scatter and migrate.

Frequently Asked Questions

How thick should a gravel driveway be? Plan for a total depth of about 4 to 6 inches of compacted gravel built up in layers, with a deeper base in soft or wet soils. A single thin layer of stone over bare dirt will rut and disappear within a season.

How often does a gravel driveway need maintenance? Expect to regrade and add a fresh top layer every 1 to 3 years depending on traffic and drainage. Filling potholes early and keeping the crown intact greatly extends the time between major top-ups.

How much gravel do I need for my driveway? Multiply length by width to get square footage, then by depth, to find volume. Our gravel calculator converts your driveway dimensions directly into tons and cubic yards so you can order the right amount in one trip.

Gravel vs Asphalt vs Concrete Driveways

Gravel is the cheapest driveway to install and the easiest to repair, but it needs regular regrading, can rut in heavy rain, and is harder to clear of snow. It suits long rural drives and budget-conscious projects where occasional maintenance is acceptable.

Asphalt costs several times more than gravel per square foot installed and lasts 15 to 20 years with periodic sealing. It offers a smooth, snow-friendly surface at a mid-range price, making it a popular compromise for suburban driveways.

Concrete is the most expensive option up front but can last 30 years or more with little maintenance and offers the most finished look. Over a long horizon its higher durability can offset the higher install cost, but the initial outlay is the largest of the three.