How many tons of gravel do I need for a driveway?

A typical two-car driveway measuring 16 × 40 feet with a 4-inch depth requires approximately 4–5 tons of gravel for the top layer alone; a 6-inch compacted base layer would add another 6–8 tons. Use the calculator with your exact dimensions and select the appropriate material type to get a precise figure for your project.

How deep should gravel be for a driveway?

A standard residential driveway needs at least 4–6 inches of compacted base aggregate (such as crusher run or road base) plus a 1–2 inch top dressing of decorative gravel. High-traffic or heavy-vehicle driveways should have a base depth of 8–12 inches for adequate load distribution.

How many tons are in a cubic yard of gravel?

Most common gravel and crushed stone weighs between 1.35 and 1.5 tons per cubic yard when loose. Fine sand is denser at 1.5–1.7 tons per cubic yard, while lightweight materials like pea gravel sit at the lower end around 1.4 tons per cubic yard.

What is the difference between gravel and aggregate?

Gravel refers to naturally occurring rounded rock particles, while 'aggregate' is a broader construction term that includes both natural gravel and crushed stone, sand, and blended materials like road base or crusher run. For calculator purposes, the key distinction is bulk density, which differs by material type.

How much gravel do I need for landscaping?

For decorative landscaping applications such as garden beds or pathways, a depth of 2–3 inches is standard. Calculate the area in square feet, multiply by the depth in feet (e.g., 2 inches = 0.167 feet), divide by 27 for cubic yards, then multiply by the material's bulk density — or simply enter your dimensions into the calculator and select your material.

Can I use this calculator for sand as well as gravel?

Yes — the calculator supports sand in addition to gravel and crushed aggregate. Because sand is denser than most gravel types (especially when moist), it is important to select the correct material so the weight conversion is accurate; using a generic gravel density for sand can underestimate your order by 10–15%.

How do I calculate gravel for an irregular or circular area?

For circular areas, calculate the base area using π × radius² before multiplying by depth; most calculators, including this one, offer a circular footprint option to handle this automatically. For L-shapes or complex layouts, split the area into simple rectangles, calculate each separately, and add the results together.

Does the calculator account for compaction?

The base calculation reflects loose, uncompacted volume, but many projects include an optional overage or compaction factor — typically 15–20% — that you can add to ensure you order enough material to achieve the desired finished depth after settling and compaction.

Gravel & Aggregate

Gravel, sand or aggregate volume and weight in tons for a given area and depth.

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Length (ft)

Width (ft)

Depth (inches)

Weight assumes typical gravel density (~1.4 tons per cubic yard).

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Gravel needed

2.59 tons

1.85 yd³ · 1.42 m³

Cubic yards

1.85

Weight (tons)

2.59

Cubic feet

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How the Gravel & Aggregate works

The Gravel & Aggregate Calculator estimates the volume and weight in tons of gravel, sand, or aggregate needed to fill a defined area at a specified depth — making it an essential tool for homeowners planning a driveway, landscapers designing a garden path, or contractors pricing a commercial job.

The calculator works by first computing the cubic volume of the space you need to fill. You input the length and width of your area (in feet, meters, or yards) along with the desired depth of material, and the tool multiplies these three dimensions together to produce a volume in cubic feet or cubic yards. This raw volume figure tells you how much physical space the aggregate must occupy, which is the foundation of every subsequent calculation.

Because gravel and sand are sold and delivered by weight — almost universally in tons in the US — the calculator converts volume to mass using a material-specific bulk density. Different aggregates have meaningfully different densities: pea gravel typically runs around 1.4–1.5 tons per cubic yard, crushed stone is closer to 1.35–1.45 tons per cubic yard, and sand can reach 1.5–1.7 tons per cubic yard depending on moisture content and grain size. Choosing the correct material type in the calculator is therefore critical; selecting 'gravel' when you actually need fine masonry sand will underestimate your order by a noticeable margin.

Depth specification is where most DIY errors occur. Recommended depths vary significantly by application: a decorative landscaping gravel layer needs only 2–3 inches, a residential driveway base requires at least 4–6 inches of compacted aggregate, and a heavily trafficked commercial driveway may call for 8–12 inches of base material. The calculator lets you model these scenarios precisely. It is also worth noting that loose aggregate compacts down 15–30% after it settles or is mechanically compacted, so many professionals add a 10–20% overage factor to their order — some versions of this calculator include that buffer as an optional input.

For irregularly shaped areas — L-shaped driveways, curved garden beds, or multi-zone projects — the best practice is to break the space into rectangular or circular sections, run the calculator separately for each, and sum the results. Circular areas use π × r² for the base area rather than length × width, and the calculator handles this automatically when you select a circular footprint. Always round your final tonnage up to the nearest half-ton increment when ordering, since delivery minimums and per-ton pricing make it cheaper to have a small surplus than to schedule a second delivery.

Formula

Volume (cu yd) = (Length × Width × Depth) ÷ 27  |  Weight (tons) = Volume (cu yd) × Bulk Density (tons/cu yd)  |  For circular areas: Area = π × radius²

Pro tips

Always measure your project area twice and note any slopes or low spots; a sloped driveway may need extra material at one end to achieve a consistent finished depth across the whole surface.
Order with a 10–15% overage buffer for decorative landscaping projects and a 20% buffer for driveways or structural sub-base work where compaction losses are more significant.
Ask your supplier for the specific bulk density of the material they stock before finalizing your order — quarry-crushed stone and river gravel from the same region can differ by 0.1–0.2 tons per cubic yard, which adds up quickly on large jobs.
For a residential driveway, use the calculator in two passes: first for the compacted gravel base layer (6 inches of crusher run or road base), then separately for the 2-inch top dressing of pea gravel or decorative aggregate.
When comparing supplier quotes, convert everything to a cost-per-ton basis using this calculator's output so you are comparing like-for-like — some suppliers quote per cubic yard, others per ton, and the difference can obscure true pricing.

Key terms

Bulk Density: — The mass of a loose aggregate material per unit volume (typically expressed in tons per cubic yard), which accounts for air gaps between particles and varies by material type, grading, and moisture content.
Cubic Yard: — The standard US unit for ordering bulk aggregate, equal to 27 cubic feet, representing a cube measuring 3 feet on each side.
Compaction Factor: — The percentage by which loose aggregate reduces in volume after being settled by weight, rain, or mechanical compaction — typically 15–30% for gravel and crushed stone.
Grading (Aggregate Size): — The classification of aggregate particles by size range (e.g., ¾-inch crushed stone, pea gravel, coarse sand), which directly affects bulk density, drainage performance, and suitability for a given application.
Overage Factor: — A deliberate surplus percentage added to the calculated quantity — commonly 10–20% — to account for compaction, uneven sub-base surfaces, and material lost during spreading.
Sub-base: — The compacted aggregate layer placed beneath a surface like concrete, asphalt, or pavers to provide structural support, load distribution, and drainage.