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Driveway Gravel Calculator: How Much Do You Need?

What Is Driveway Gravel?

Not all gravel performs the same way under vehicle traffic, and choosing the wrong type is one of the most common mistakes homeowners make when building a new driveway. The critical distinction is shape: angular, crushed stone interacts very differently with tire pressure than rounded, water-worn stone. Angular aggregate has sharp, fractured faces that grip neighboring particles, creating a mechanically stable layer that tightens with use rather than loosening. Rounded stones, by contrast, act more like ball bearings — they roll away from pressure instead of locking in place, which is why river rock and pea gravel scatter across lawns and into ditches after the first few weeks of traffic.

The most popular driveway gravel products in the United States are 3/4-inch minus crushed stone (also called dense-grade aggregate or #610 in some regions), 3/4-inch clean crushed stone for drainage layers, and recycled asphalt millings. Dense-grade material contains a mix of stone sizes from 3/4 inch down to stone dust, which compacts to a nearly solid surface after a few passes from a vibratory plate or roller. Clean 3/4-inch stone leaves visible gaps and offers better water infiltration, making it a good choice for regions with heavy rainfall where you want water to pass through the driveway rather than run off the edges.

Standard driveway gravel runs about 103 pounds per cubic foot, which translates to 1.39 tons per cubic yard. That density is the basis for all the calculations on this page. Keep in mind that delivered gravel is loose, so a quoted cubic yardage will compact down 10–15% after rolling, especially with dense-grade materials. Always purchase slightly more than your calculated minimum.

How to Calculate Driveway Gravel

Formula: Length (ft) × Width (ft) × Depth (ft) = Cubic feet → ÷ 27 = Cubic yards → × 1.39 = Tons

Convert depth from inches to feet by dividing by 12 before plugging into the formula.

Worked example — 150 ft × 10 ft driveway at 4 inches deep:

Order 29 tons (about 12% overage) to allow for spreading losses and to fill any soft spots that surface during compaction.

Coverage Table

Coverage figures represent loose, uncompacted material before any rolling or traffic.

Depth Per cubic yard Per ton Typical use
2 inches 162 sq ft 117 sq ft Light touch-up layer
3 inches 108 sq ft 78 sq ft Topdress on existing base
4 inches 81 sq ft 58 sq ft Minimum new driveway depth
6 inches 54 sq ft 39 sq ft Soft subgrade or heavy use
8 inches 40 sq ft 29 sq ft Commercial or farm driveway

These values are based on 103 lb/ft³ (1.39 tons/yd³). After compaction with a plate compactor or roller, expect the finished layer to be approximately 15% shallower than the loose depth.

How Much for Common Driveway Projects

100-ft one-lane driveway, 10 ft wide, 4 inches deep

This is the most common residential driveway scenario:

200-ft rural driveway, 12 ft wide, 6 inches deep

Rural driveways that carry tractors, grain trucks, or delivery vehicles need more depth:

Two-car-wide apron or parking pad, 20 × 30 ft, 4 inches deep

Entry aprons and parking pads need the same minimum depth as the driveway itself:

Buying and Delivery Tips

Driveway gravel is sold by the ton at quarries and aggregate yards. For most residential projects larger than 5 tons, bulk delivery by a dump truck is far more economical than hauling it yourself in a pickup. A half-ton pickup can safely carry roughly 1 ton of gravel in the bed — a large driveway project that needs 20 tons would require 20 separate pickup runs, compared to a single or double truck delivery.

Call ahead and specify the product name as precisely as possible: tell the supplier your planned depth, the subgrade condition (firm soil, clay, or sand), and whether you plan to compact it. A knowledgeable supplier will recommend the right product. For most residential driveways on solid soil, 3/4-inch minus dense-grade is the standard recommendation. If your soil drains poorly or the driveway borders a drainage swale, a two-layer system works better: a 4-inch base of coarser open-grade stone, topped with 2 inches of dense-grade for the driving surface.

Truck access is the most overlooked planning factor. A loaded tandem-axle truck weighs 60,000–80,000 pounds and needs a clear path to the driveway entrance at least 12–14 feet wide. Low-hanging tree branches, soft lawn areas, and tight corners can prevent delivery to where you actually need the stone. Talk to your driver before the load is scheduled — not the morning of delivery.

When multiple loads are ordered, ask whether they can be spread on the same day. Gravel spreads and compacts most efficiently when placed and worked in one session rather than across multiple days.

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Shape
1.72US tons
Cubic yards
1.23 yd³
Cubic feet
33.33 ft³
Weight
3,433 lb

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Frequently Asked Questions

How much gravel do I need for a 100-foot driveway?

A 100-foot driveway that is 10 feet wide and 4 inches deep needs about 12.3 cubic yards or 17 tons of gravel. If the lane is 12 feet wide at the same depth, the total increases to 14.8 cubic yards and 20.6 tons. Always add 10–15% to account for spreading losses and settling over the first season.

How many cubic yards of gravel for a standard driveway?

A standard residential one-lane driveway (10 ft wide, 100 ft long) at 4 inches deep needs approximately 12 cubic yards. At 6 inches deep — a depth many contractors recommend for soft or clay subgrades — the same driveway requires about 18.5 cubic yards. A two-lane driveway 20 feet wide at 4 inches takes roughly 25 cubic yards per 100 feet of length.

How deep should gravel be on a driveway?

For a lightly used residential driveway on firm soil, 3–4 inches of gravel is the minimum practical depth. On soft, sandy, or clay-heavy subgrades, 6 inches is far more reliable and prevents the driveway from developing ruts after wet weather. High-traffic rural driveways or those used by heavy farm equipment often require 8 inches of compacted base to avoid failure.

What type of gravel is best for a long gravel driveway?

Angular crushed stone is the best choice for long driveways because the fractured edges interlock under vehicle traffic and stay in place. Crushed limestone #610, 3/4-inch minus crushed stone, or recycled asphalt millings are all excellent options. Avoid round river rock or pea gravel for driveway surfaces — smooth, rounded stones roll under tires, scatter to the edges, and never stabilize properly.

How much does driveway gravel cost per ton or per yard?

Bulk driveway gravel typically costs $15–$40 per ton at the quarry, depending on stone type and your region. Delivered to your driveway, expect to pay $25–$55 per ton including freight for hauls under 20 miles. Some suppliers quote by the cubic yard instead — convert using 1.39 tons per cubic yard for standard crushed stone. Recycled asphalt millings often run cheaper, around $10–$20 per ton delivered.

How do I calculate gravel for a driveway in square feet?

Multiply the driveway's total square footage by the depth in feet, then divide by 27 to get cubic yards, then multiply by 1.39 to convert to tons. For example, a 1,500 sq ft driveway at 4 inches: 1,500 × (4÷12) = 500 cubic feet ÷ 27 = 18.5 cubic yards × 1.39 = 25.7 tons.

How many tons of 3/4-inch crushed stone for a driveway?

The exact tonnage depends on dimensions and depth. A 100 × 10 ft driveway at 4 inches needs about 17 tons of 3/4-inch crushed stone. At 6 inches, the same driveway requires roughly 25.5 tons. Use the formula: length × width × (depth ÷ 12) ÷ 27 × 1.39 to calculate tons for any driveway size.

How many truckloads of gravel do I need?

A standard tandem-axle dump truck carries 14–16 tons of crushed stone, or roughly 10–12 cubic yards. A tri-axle or super-dump can carry up to 20 tons. Divide your total tonnage by 14 (conservative truck capacity) to estimate the minimum number of loads. For a 200-foot driveway needing 35 tons, that's about 3 truckloads.

Last updated: 2026-06-29