Free US Driveway Gravel Calculator — Traffic Load Advisor + Dump Truck Loads

Driveway Gravel Calculator — Traffic Load Depth Advisor, 3-Layer System, Tons to Dump Truck Loads & Geotextile Fabric

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

For a 12-foot wide passenger car driveway at 7 inches total depth: approximately 29–34 yd³ (39–47 tons), or 3 single-axle dump truck loads. For a 14-foot wide truck driveway at 10 inches: approximately 57 yd³ (77 tons), or 6 loads.

Q: What is the best gravel for a driveway?

Crusher run (Dense Grade Aggregate) for the surface layer — self-binding, compacts firm. #57 crushed stone for the base layer — angular particles interlock under compaction. Avoid pea gravel and river rock — round stones do not compact and shift under vehicle tires.

Q: How deep should gravel be for a driveway?

Minimum total depth: walking paths 2-3 in; passenger cars 7 in (4 in base + 3 in surface); trucks and trailers 10 in (6+4); heavy RVs/equipment 14 in (10+4). These are compacted depths — pour 15-20% more to account for compaction.

Q: How many tons fit in a dump truck?

Single-axle dump truck: 12-14 tons (approx 8-10 yd³). Tandem-axle: 20-22 tons (approx 14-16 yd³). Tri-axle: up to 28 tons. This calculator shows loads needed for both truck types.

The only driveway gravel calculator that recommends base and surface depths by traffic type — walking path, passenger cars, trucks and horse trailers, or heavy RVs — then calculates your order in cubic yards, tons, and exact dump truck loads. Includes geotextile fabric area and a layer-by-layer cost breakdown.

Your Driveway Project

Step 1 — Traffic Type (sets recommended depths)

Standard residential driveway. 4 in compacted base + 3 in surface per AASHTO guidelines.

Step 2 — Driveway Dimensions

Length (ft)

Width (ft)

Step 3 — Layer Depths (auto-set by traffic type)

🏗️ Base Layer (compacted sub-base)

Base Depth

4 in

🪨 Surface Layer (finish gravel)

Surface Depth

3 in

Step 4 — Gravel Type

Dense Graded Aggregate — best driveway surface. Self-compacts, binds well, low dust.

Step 5 — Options & Pricing

Bulk Gravel Price (per yd³)

$/yd³

Overage / Compaction Factor

15%

Show dump truck load breakdown in results

Calculate geotextile fabric area needed

Your Results

Select your traffic type, enter driveway dimensions, choose gravel type, then click Calculate Gravel. Results include base + surface layers separately, dump truck loads, and fabric area.

Driveway Gravel Calculator — How Much Gravel, What Type, How Deep, and How Many Dump Truck Loads for US Residential and Farm Driveways

A gravel driveway is one of the most cost-effective, low-maintenance surfaces an American homeowner or farmer can install — but getting the material quantities right requires more than multiplying length by width by depth and dividing by 27. The depth you need depends directly on what’s driving on it. A walking path needs 3 inches of surface gravel. A standard residential car driveway needs 7 inches total across two layers. A farm driveway handling loaded grain trailers needs 14 inches or more, properly layered and compacted.

Most online calculators ignore this entirely and produce one number for “gravel volume.” This calculator uses the same layered approach that road engineers and AASHTO (American Association of State Highway and Transportation Officials) standards recommend for flexible pavement design — a compacted granular base layer beneath a finished surface layer — and applies it at residential scale with the real-world compaction factors that make the difference between a driveway that holds up for 20 years and one that needs regrading every spring.

The 3-layer system: (1) Geotextile fabric on native soil — prevents gravel sinking, suppresses weeds. (2) Compacted base layer — 4 to 10 inches of #57 crushed stone or crusher run, depending on traffic. (3) Surface layer — 3 to 4 inches of crusher run or dense-grade aggregate, compacted smooth. Each layer’s volume is calculated separately because the two gravel types may differ.

Driveway Gravel Depth by Traffic Type — AASHTO-Based Recommendations for US Residential, Farm, and Commercial Driveways

The single most important decision in a gravel driveway project is depth, and depth is entirely determined by what’s going to drive on it. The American Association of State Highway and Transportation Officials establishes pavement design standards based on traffic load — and those same principles scale down to residential driveways.

Traffic Type	Base Layer	Surface Layer	Total Depth	Typical Use
🚶 Walking Path / Light Use	None required	2–3 in	2–3 in	Garden paths, pedestrian areas, golf cart access
🚗 Passenger Cars	4 in compacted	3 in	7 in total	Standard residential driveway, 1–2 cars daily
🚛 Trucks / SUVs / Horse Trailers	6 in compacted	4 in	10 in total	Heavy pickups, livestock trailers, farm equipment <10T axle
🏗️ RVs / Heavy Commercial	10 in compacted	4 in	14 in total	Class A motorhomes, grain trucks, heavy equipment haul roads

Why Two Layers? The Base and Surface Do Different Jobs

The base layer (typically #57 crushed angular stone) distributes the load of a passing vehicle across a wider area of the sub-grade soil. Angular particles interlock when compacted, creating a stable platform that resists the vertical stress of axle loads without sinking. The surface layer (typically crusher run or dense grade aggregate) is a finer, self-binding material that compacts into a smooth, firm driving surface with less loose-stone scatter. Using only one material for both functions — which most homeowners do when they pour a single load of gravel — produces a driveway that either compacts too hard and loses surface texture (if you use crusher run throughout) or stays too loose and shifts under tires (if you use #57 throughout).

Three Real US Driveway Gravel Projects, Calculated

Example 1: Nashville, TN — 250 ft Horse Farm Driveway, Loaded Trailers, 3-Layer System

Williamson County — Rural property, 250 ft × 14 ft driveway, loaded 3-horse trailer (GVW 18,000 lbs), daily farm equipment access

The Harrington family in Franklin, TN is building a new driveway to their barn. Their loaded 3-horse trailer weighs approximately 18,000 lbs — about 9 tons — which puts it firmly in the truck/heavy trailer category requiring at minimum 6 inches of compacted base. The driveway is 250 feet long and 14 feet wide. Tennessee’s clay-heavy soil requires geotextile fabric to prevent gravel migration.

Step	Base Layer (#57 Stone)	Surface Layer (Crusher Run)
Dimensions	250 ft × 14 ft = 3,500 sq ft
Depth	6 in (truck/trailer rating)	4 in finish surface
Volume (+ 15% waste/compaction)	3,500 × 6 ÷ 12 ÷ 27 × 1.15 × 1.18 = 74.2 yd³	3,500 × 4 ÷ 12 ÷ 27 × 1.15 × 1.15 = 57.2 yd³
Weight (× 1.35–1.45 T/yd³)	74.2 × 1.35 = 100.2 tons	57.2 × 1.45 = 82.9 tons
Subtotal	$100.2 × $38 = $3,808	82.9 × $38 = $3,150
Dump truck loads (14T)	8 loads	6 loads

✅ Total: 131.4 yd³ · 183.1 tons · 14 single-axle loads (or 9 tandem-axle loads) · ~$6,958 materials. Plus geotextile fabric: 3,500 × 1.10 = 3,850 sq ft → 3 rolls of standard 6×300 ft fabric (~$180). The farm manager negotiates bulk pricing for 183 tons and gets $35/yd³, saving $400 over retail. Key construction note: both layers must be spread and compacted in 3-inch lifts with a plate compactor or roller — dumping the full 6-inch base in one pour and driving on it without compaction defeats the purpose entirely.

Example 2: Austin, TX — New Build Access Road, 400 ft, Construction Equipment Phase

Travis County — New construction site, 400 ft × 16 ft temporary access road, concrete trucks (GVW 66,000 lbs), must support heavy equipment through build phase

A homebuilder in Cedar Park needs a temporary access road for the construction phase — concrete trucks, flatbeds, and excavator transport. This is the heavy/commercial category. After construction, the same road will become the permanent residential driveway for a Class A motorhome. The Austin clay soil (expansive black clay) is notoriously poor for gravel retention without fabric.

Parameter	Value
Dimensions	400 ft × 16 ft = 6,400 sq ft
Traffic rating	Heavy/commercial — 10 in base + 4 in surface
Base layer volume	6,400 × 10 ÷ 12 ÷ 27 × 1.15 × 1.18 = 268 yd³
Surface layer volume	6,400 × 4 ÷ 12 ÷ 27 × 1.15 × 1.15 = 104 yd³
Total	372 yd³ · ~516 tons
Dump trucks (22T tandem)	24 tandem loads — typically run 2–3 per day
Fabric	6,400 × 1.10 = 7,040 sq ft → 4 rolls
Materials cost est.	372 yd³ × $38 = $14,136

✅ At this volume, the builder negotiates a direct delivery contract with a local quarry for $32/yd³ ($11,904) — saving $2,232 vs. retail. The 10-inch base is critical in Austin’s expansive clay; the soil can swell 3–4 inches seasonally. Fabric on top of the clay prevents gravel from being sucked down into clay fissures during dry spells. After the build phase, the contractor adds a fresh 2-inch surface layer of crusher run ($3,750) before the homeowners move in — well worth the cost versus rebuilding the entire road.

Example 3: Portland, OR — 120 ft Residential Driveway, Wet Climate, Top-Up Calculation

Multnomah County, Zone 8b — Existing driveway losing surface depth after wet winters, needs 2 in top-up over 120 ft × 10 ft

The Bergman family’s gravel driveway in southeast Portland has gradually thinned after several wet winters — rain washes fine material off the edges and into the yard. They need to know how much crusher run to order for a 2-inch top-up, not a full replacement. Portland’s annual rainfall (36 inches) means gravel migration is a recurring maintenance issue.

Step	Calculation
Area	120 ft × 10 ft = 1,200 sq ft
Top-up depth needed	2 in surface only (base still intact)
Volume (+ 15%)	1,200 × 2 ÷ 12 ÷ 27 × 1.15 × 1.15 = 9.0 yd³
Weight	9.0 × 1.45 = 13.1 tons
Dump truck loads	1 single-axle load (14T capacity — fits in one trip)
Materials cost	9.0 yd³ × $42 = $378

✅ One load handles this cleanly — the family orders a single 14-ton single-axle delivery at $420 including delivery, which provides the 9 yd³ needed with a small surplus for low spots and edge repair. Portland tip: crusher run (DGA) with some fines holds better than pure #57 stone in wet climates because the fines bind the surface and reduce washout. The family also installs a simple French drain along the low edge of the driveway to redirect runoff, which significantly extends the time between top-ups.

Three Expert Tips for US Driveway Gravel Projects

Order Slightly More Than Calculated and Crown the Driveway — Flat Driveways Fail Faster

A critical detail most homeowners miss: gravel driveways must be crowned — slightly higher in the center than on the edges — to shed rainwater to the sides rather than pooling in the tire tracks. The standard crown is 3–4% side slope (about 3/8 inch drop per foot of width). For a 12-foot wide driveway, the center should be approximately 2 inches higher than the edges after compaction. If you lay gravel flat, water pools in tire tracks, softens the sub-base, and accelerates rut formation. This also means ordering 10–15% extra material beyond the calculated volume — you’ll use it to build the crown and fill any soft spots discovered during grading.

Geotextile Fabric Under the First Layer Is the Single Best Investment You Can Make

A roll of woven geotextile fabric costs $80–120 and will extend your driveway’s life by 5–10 years. Without it, your base gravel gradually migrates downward into soft or clay soil, and the surface eventually develops ruts as the base disappears. The fabric acts as a separator — it lets water drain through but physically blocks the soil and gravel from mixing. It also suppresses weed growth through the driveway surface. Installation is simple: lay it on the graded native soil, overlap seams by 12–18 inches, then dump and spread the base gravel on top. There is no comparable maintenance investment that delivers better return for a gravel driveway.

Never Use Pea Gravel or River Rock for a Driveway — They Look Great at the Store and Fail Immediately

Both pea gravel and river rock are round, smooth stones. Round stones do not interlock or compact — they roll under vehicle tires, scatter to the edges within weeks, and create an unstable surface that is uncomfortable to walk on and damaging to vehicles at speed. They are appropriate for decorative garden beds, drainage swales, and pathways where no vehicle traffic occurs. For any driveway, use angular crushed stone: #57 crushed stone for the base layer (it interlocks when compacted) and crusher run or dense grade aggregate for the surface (it contains a mix of particle sizes that bind together). Many homeowners are surprised that “prettier” gravel choices are strictly inferior for driveways — the angularity of the stone is the engineering property that makes it work.

Frequently Asked Questions About Driveway Gravel

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

It depends on width and traffic. For a standard 12-foot wide passenger car driveway at 4 in base + 3 in surface: 1,200 sq ft × 7 in total ÷ 12 ÷ 27 × 1.15 compaction × 1.10 waste = 29.3 yd³ ≈ 39.5 tons. For a 14-foot wide truck driveway at 6 in base + 4 in surface: 1,400 sq ft × 10 in ÷ 12 ÷ 27 × 1.15 × 1.15 = 57 yd³ ≈ 77 tons. A 100-ft driveway for cars needs roughly 2–3 single-axle dump truck loads; for trucks and trailers, plan on 5–6 loads.

What is the best gravel for a driveway?+

Crusher run (also called Dense Grade Aggregate or DGA) is the best all-around surface material for most US driveways. It contains a mix of crushed stone sizes from fines to 3/4 inch that compact together into a firm, stable surface with minimal loose scatter. For the base layer, #57 crushed stone is preferred — the angular particles interlock when compacted, providing maximum structural support. Using #57 for the base and crusher run for the surface is the professional standard for residential driveways in most US climates. Avoid pea gravel and river rock for any driveway — their round shape prevents compaction.

How deep should gravel be for a driveway?+

Minimum total depth depends on traffic: walking paths (2–3 in surface only); passenger cars (4 in base + 3 in surface = 7 in); trucks and horse trailers (6 in base + 4 in surface = 10 in); heavy equipment and RVs (10 in base + 4 in surface = 14 in). These depths are for compacted gravel — pour 15–20% more to account for compaction settlement. All depths refer to the finished, compacted depth, not the loose pour depth before grading and rolling.

How many tons of gravel do I need per square foot?+

At 1 inch of depth: approximately 0.006 tons per square foot (using 1.4 T/yd³ average density). Quick math: multiply your area in sq ft by 0.006, then multiply by the number of total inches of gravel. For 1,200 sq ft at 7 inches total: 1,200 × 0.006 × 7 = 50.4 tons. Suppliers sell by the ton at bulk prices of $30–55/ton depending on region and material type. Always add 15% for compaction and overage.

How many tons fit in a dump truck?+

Standard capacities: single-axle dump truck holds 12–14 tons (approximately 8–10 yd³ of gravel); tandem-axle holds 20–22 tons (approximately 14–16 yd³). Tri-axle trucks can carry up to 28 tons. For small residential projects (under 30 tons), a single-axle is most common and easier to navigate residential roads. For large projects (50+ tons), tandem-axle loads reduce per-trip delivery costs significantly. Always confirm the truck size with your supplier when ordering — some rural suppliers only have single-axle trucks.

Do I need landscape fabric under driveway gravel?+

For most driveways in clay or sandy soil, yes — geotextile fabric under the base layer is highly recommended. Woven geotextile fabric (not the flimsy landscaping fabric sold in garden centers) acts as a separator between the native soil and your gravel base, preventing the two from mixing over time. Without fabric, clay soil in wet climates gradually absorbs the base gravel, causing the driveway to lose depth and develop ruts. Fabric also suppresses weed growth. Use commercial-grade woven geotextile (4-oz or 6-oz minimum), not the thin plastic sheeting sold for residential use — thin plastic tears under vehicle loads.

How much does it cost to gravel a driveway?+

US national averages for 2024–2025: Materials only: $30–55 per ton of gravel (delivered). A standard 100-ft × 12-ft car driveway at full depth costs $1,100–2,200 in materials. Installation by a contractor (grading, compaction, shaping) adds $1–3 per sq ft of labor, or $1,200–3,600 for the same project. Total installed cost for a 100-ft residential driveway: typically $2,300–5,800 depending on site preparation needed, local material costs, and contractor rates. Long rural driveways (500+ ft) benefit most from bulk material pricing — often 20–30% below retail when ordering 100+ tons direct from a quarry.

What is crusher run gravel?+

Crusher run (also called Dense Grade Aggregate, DGA, road base, or processed gravel) is a mixture of crushed stone and stone dust produced when quarry stone is processed through a crusher. Unlike washed gravel (#57 stone), crusher run retains all particle sizes from coarse to fine. This makes it self-binding — the fine particles fill the voids between coarser stone and the mixture compacts into a firm, stable surface. It is the material of choice for driveway surfaces because it provides a smooth, hard-packed finish with minimal loose scatter. It is also one of the most economical gravel options, typically $32–45/ton depending on region.

Can I use gravel for a steep driveway?+

Slopes above 8–10% (roughly 1 foot of rise per 10 feet of run) are challenging for gravel driveways. Gravity causes gravel migration downhill under vehicle traction and rainfall. For slopes 5–10%: use fine crusher run or limestone screenings (they bind better than coarse stone), install culverts and edge swales to control water runoff, and expect to top up the surface annually. For slopes over 10%: consider concrete or asphalt instead, or break the driveway into sections with gravel parking areas at flat sections. If you must use gravel on a steep slope, geotextile fabric is not optional — it is essential for preventing gravel from washing into the road.

How do I calculate cubic yards of gravel from linear feet?+

Formula: Cubic yards = (Length ft × Width ft × Depth in) ÷ 12 ÷ 27. Example: 200 ft driveway × 12 ft wide × 4 in deep = 200 × 12 × 4 ÷ 12 ÷ 27 = 29.6 yd³. Then add 15% for compaction and waste: 29.6 × 1.15 = 34.1 yd³. To convert to tons: 34.1 × 1.40 (average density) = 47.7 tons. To find dump truck loads: 47.7 ÷ 14 (single-axle) = 4 loads. This calculator handles all steps automatically for both base and surface layers.

What is #57 crushed stone and when should I use it?+

#57 stone is a ASTM-graded crushed aggregate with particles ranging from 3/4 inch to approximately 1-1/2 inches, washed to remove fines. The “57” refers to the ASTM D448 gradation specification. Its angular, interlocking shape makes it ideal for driveway base layers — it compacts into a stable matrix under load and provides excellent drainage due to the open void space between particles. It should not be used as a surface material on its own because the lack of fines means vehicles will throw loose stones. Use #57 for the base layer and top with crusher run for the driving surface.

How often does a gravel driveway need to be replenished?+

A well-installed driveway with geotextile fabric typically needs a surface top-up every 3–5 years — adding 1–2 inches of crusher run to restore surface depth as the fines compact and some material migrates to the edges. Without fabric, top-ups may be needed every 1–2 years. Signs that a top-up is needed: tire tracks visible as depressions in the surface; loose gravel accumulating on the edges while the center thins; visible dirt or mud during wet weather. A top-up is calculated the same way as the original surface layer — just for 1–2 inches rather than 3–4.

What is the difference between cubic yards and tons for gravel ordering?+

Cubic yards measure volume; tons measure weight. Suppliers price by the ton at local quarries but often quote in cubic yards in retail settings. The conversion depends on gravel density: #57 crushed stone ≈ 1.35 tons/yd³; crusher run ≈ 1.45 tons/yd³; limestone ≈ 1.40 tons/yd³. Always confirm with your supplier which unit they use. When ordering for delivery, you need tons — the truck is loaded by weight on a scale, not by volume. This calculator shows both units to help you translate between the two when getting quotes from multiple suppliers.

Can I install a gravel driveway myself?+

DIY is feasible for driveways under 150 feet with relatively flat terrain and good soil. Key requirements: a mini-excavator or skid steer for grading (rental is $400–700/day), a plate compactor for compacting the base in lifts (rental $80–150/day), and access to bulk delivery (the gravel must be delivered by truck). For longer driveways, irregular terrain, poor soil, or clay sub-grade, hiring a site contractor with a motor grader is more cost-effective — they can grade, place fabric, and compact both layers in 4–8 hours for a flat rural driveway. Materials-only DIY saves contractor markup (typically 20–40%) but requires significant equipment investment.

Is gravel or asphalt cheaper for a driveway?+

Gravel wins on upfront cost. Installed asphalt averages $4–8 per square foot; installed gravel averages $1–3 per sq ft. For a 100-ft × 12-ft driveway: asphalt costs $4,800–9,600 installed vs. gravel at $1,200–3,600 installed. However, asphalt requires less maintenance (no regrading, no annual top-ups) and handles moisture better in wet climates. Gravel’s 20-year ownership cost can approach asphalt if you factor in annual top-ups and periodic professional regrading. In rural areas where truck access is easy and bulk material prices are low, gravel remains significantly cheaper over time. Asphalt makes more economic sense for short urban driveways where material costs are high and aesthetics matter.

How wide should a driveway be?+

AASHTO and most US building codes: single-lane minimum 10 feet; standard residential 12 feet; recommended with slight room for correction 14 feet; two-lane passing 20–24 feet; agricultural roads with large equipment 16–20 feet. For farm driveways that need to pass a tractor with 8-foot wide equipment, 14 feet provides minimal clearance — 16 feet is more practical. For driveways with fire department access requirements (applicable to homes over 150 feet from the road in many jurisdictions), most fire codes require 12–14 feet minimum width with 13.5–14 feet of vertical clearance. Check your local fire code if your driveway is over 150 feet long.

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Legal Disclaimer, Editorial Transparency & Engineering Notice

Engineering Note: Depth recommendations in this calculator are based on general AASHTO flexible pavement design principles adapted for residential scale, and published guidance from the Federal Highway Administration (FHWA) and extension resources on rural road construction. These are general guidelines — actual depth requirements depend on sub-grade soil bearing capacity (CBR value), traffic frequency, climate zone, drainage conditions, and local codes. For commercial driveways, farm haul roads, or any application subject to permit requirements, consult a licensed civil engineer or your county road department.

Volume & Cost Estimates: All volume calculations include compaction and waste factors based on typical US field conditions. Actual material requirements vary by installation method, site conditions, gravel density, and contractor practices. Pricing reflects US national averages for 2024–2025 and varies significantly by region and supplier. USCalculators.com has no affiliation with any gravel supplier or AASHTO.