Driveway Calculator
This free driveway calculator app accepts square feet dimensions and delivers a complete gravel driveway cost calculator — two-layer gravel system, 5 material comparison (gravel, asphalt, concrete, pavers, stamped concrete), waste factor, delivery weight, and bag counts — all in one tool.
Driveway Dimensions
Most driveways use Rectangle. Circle is for turnarounds.
Two-Layer Gravel System
Calculation Results
Volume
9.88
cu yd (266.7 cu ft)
Weight
18
US tons (36000 lbs)
Volume
4.94
cu yd (133.3 cu ft)
Weight
10.67
US tons (21333 lbs)
Volume
16.3
cu yd
Weight
31.53
US tons
Bulk Bags
2
0.5 yd³ bulk bags
Low
$1,000
Mid
$2,200
High
$3,600
Low
$2,800
Mid
$4,400
High
$6,400
Low
$3,600
Mid
$5,600
High
$8,000
Low
$4,800
Mid
$7,600
High
$12,000
Low
$5,600
Mid
$8,800
High
$14,400
10.86 cu yd · 19.8 US tons
5.43 cu yd · 11.73 US tons
✨More than just a cubic yard number
Most driveway calculators give you one material amount and stop. This free driveway calculator app lets you enter square feet dimensions and get gravel driveway cost calculator estimates — pick gravel type for base vs top, compare asphalt and concrete side-by-side, check if old driveway removal fits the budget, and see exactly what you'll haul to the yard.
Two-layer gravel system
Base layer (ABC/CA6/Class 5) for structural load and top layer (#57, pea gravel) for decorative surface — the way professional installers actually build driveways.
5 materials side-by-side
Gravel, asphalt, concrete, interlocking pavers, and stamped concrete — all with low/mid/high installed cost ranges and lifespan in one comparison table.
12 gravel types & densities
ABC, CA6, #57, #4, #8, pea gravel, river rock, DG, crushed limestone, recycled concrete, lava rock, and concrete sand — each with compacted density per ASTM D448.
Shapes, presets & units
Rectangle, circle (for turnarounds), or triangle. Four quick presets for common driveway sizes. Both imperial and metric output available.
⚡Quick answers people search for most
The driveway numbers people look up every day — worked out with the same calculation engine powering the tool above.
🚗
20×40 Two-Car Driveway
2.8 cu yd base + 1.4 cu yd top
4" CA6 + 2" #57 crushed stone, 10% waste, 415 sq ft
🪨
Base layer 400 sq ft
7.4 cu yd · 10.3 tons
4" ABC base, compacted density 140 lb/ft³, +10% waste
💲
20×40 Gravel Driveway
$600 – $1,800 installed
$1.25–$4.50 per sq ft, includes labor and base prep
🛣️
Cheapest per sq ft
Gravel @ $1.25
vs asphalt $3.50, concrete $4.50, pavers $6.00
⏱️
Longest lifespan
Concrete 30–50 yrs
vs asphalt 15–30, gravel 8–15, pavers 25–50+
📦
How many bulk bags?
15 bags (0.5 yd³ each)
For 20×40 with +10% waste total of ~7.5 cu yd
📝How to use the Free Gravel Driveway Calculator
Five steps from tape measure to supplier quote — this free driveway calculator takes your square feet dimensions and outputs gravel driveway cost calculator estimates, cubic yards, tons, and bag counts.
Pick a preset or enter dimensions
Start with a common size preset (single-car, two-car, long driveway, or large) — it auto-fills length and width. Or type your own. Most driveways are rectangles; turnarounds can use the Circle shape.
Choose two gravel layers
Professional gravel driveways use two layers. The base carries the load (ABC/CA6/Class 5 works best — 4 inches is standard). The top is decorative surface (#57 crushed stone, #8, or pea gravel — 2 inches is standard). Pick depths and materials for each.
Review your gravel quantities
The results panel shows volume (cubic yards), weight (US tons and metric tonnes), and bag counts for each layer and the total. The total automatically adds 10% waste (change the percentage if your job needs more or less).
Compare all 5 driveway materials
The cost comparison table shows gravel, asphalt, concrete, interlocking pavers, and stamped concrete — all installed cost side-by-side with low/mid/high ranges and expected lifespan. See which fits your budget.
Add extras if you're planning the full job
Toggle 'Additional Work Costs' to include site prep, old driveway removal, permits, apron/culvert, grading, and drainage. Each has a sensible default you can override with local quotes.
🧪Worked example: 20' × 40' two-car gravel driveway
Every result on this page comes from transparent math — no black box. Here's a real two-layer gravel calculation for 800 square feet from start to finish.
The math, step by step
- Area: 20 × 40 = 400 sq ft
- Base volume: 400 × (4/12) = 133.3 cu ft = 4.94 cu yd
- Base weight @ 140 lb/ft³: 133.3 × 140 = 18,666 lbs = 9.33 tons
- Top volume: 400 × (2/12) = 66.7 cu ft = 2.47 cu yd
- Top weight @ 160 lb/ft³: 66.7 × 160 = 10,667 lbs = 5.33 tons
- Total without waste: 7.41 cu yd · 14.67 tons
- +10% waste: 8.15 cu yd · 16.14 tons — that's what to order
- Material cost estimate (2026): ~$3,000–$5,500 installed for gravel
Calculator output for this example
Area
400
sq ft
Base + Top Total
14.81
cu yd (no waste)
+10% Waste
16.3
cu yd to order
Total Weight
32.27
US tons incl. waste
Rule of thumb: order by the waste-applied cubic yard number — not the raw number. Suppliers deliver by the cubic yard, and you cannot "split" a truck. Always round up to full cubic yards.
🪨Gravel types — what to use where
Not all gravel is the same. Choosing the right stone for each layer is the difference between a driveway that lasts 10+ years and one that washes out after the first storm. These compacted density values come from ASTM D448 specifications.
Base Layer materials (structural)
ABC / Crusher Run Aggregate Base Course — well-graded, compacts to hard surface | 140 lb/ft³ |
CA6 / 21AA / Class 5 State-specified dense-graded base, clay binder for stability | 135 lb/ft³ |
Crushed Limestone Angular white/grey limestone, pH neutral | 150 lb/ft³ |
Recycled Concrete Crushed concrete slab, sizes 3/4" – 2" | 145 lb/ft³ |
#57 Crushed Stone 1" – 1.5" angular crushed stone, clean (no fines) | 160 lb/ft³ |
#4 Crushed Stone 2" – 3" clean angular stone, large void space | 155 lb/ft³ |
Pea Gravel 3/8" smooth rounded river gravel | 108 lb/ft³ |
Top Layer materials (surface)
Crushed Limestone Angular white/grey limestone, pH neutral | 150 lb/ft³ |
#57 Crushed Stone 1" – 1.5" angular crushed stone, clean (no fines) | 160 lb/ft³ |
Pea Gravel 3/8" smooth rounded river gravel | 108 lb/ft³ |
River Rock 1" – 6" smooth rounded stones | 95 lb/ft³ |
Decomposed Granite (DG) Fines to 1/4" particles, compacts well | 130 lb/ft³ |
#8 Crushed Stone 3/8" – 3/4" clean crushed stone | 165 lb/ft³ |
Lava Rock Lightweight volcanic rock, very porous | 80 lb/ft³ |
Density values are compacted (ASTM D448). For loose, multiply by ~0.85. Also accept "Custom Density…" in the calculator — use the number from your supplier quote.
Base vs. top layer rule: Base layer uses angular stone with fines (ABC/CA6) — the small particles fill voids and compact rock-hard. Top layer uses clean stone (#57, #8, pea gravel) — no fines, so water drains through instead of pooling on the surface. Mixing these up is the #1 mistake DIY driveway builders make.
💰5 driveway material cost comparison (2026 installed)
Prices are national averages for a standard residential driveway installation — including labor, base prep, and the material itself. Your local cost will vary by region, job complexity, and contractor.
| Material | Icon | $ / sq ft (Low–High) | Typical Depth | Lifespan | Best For |
|---|---|---|---|---|---|
| Gravel | 🪨 | $1.25 – $4.50 | 6\" compacted | 8–15 years | Lowest upfront cost; needs periodic regrading and replenishment |
| Asphalt | 🛣️ | $3.50 – $8.00 | 4\" compacted | 15–30 years | Smooth, dark surface that stays pliable in cold weather; reseal every 3–5 years |
| Concrete | 🧱 | $4.50 – $10.00 | 5\" compacted | 30–50 years | Longest lifespan; hard, crack-resistant surface; higher initial investment |
| Interlocking Pavers | 🧱 | $6.00 – $15.00 | 7\" compacted | 25–50+ years | Decorative, individual pavers can be replaced; premium curb appeal |
| Stamped Concrete | 🎨 | $7.00 – $18.00 | 5\" compacted | 25–45 years | Concrete patterned and colored to look like stone, brick, or wood |
Gravel is cheapest upfront, but plan on regrading and replenishing every 3–5 years ($300–$800 each time) and full replacement every 10–15 years. Concrete costs more initially but has zero maintenance cost over its 30–50 year life.
Pavers can be individually replaced if one cracks or settles — a huge advantage over concrete (once it cracks, you patch it) or asphalt (patching is visible and messy). They're also completely frost-heave resistant in cold climates.
📐How much gravel by driveway size?
Quick-reference cubic yards and tons by square feet for a standard two-layer gravel build — 4 inch compacted CA6 base under 2 inch #57 crushed stone top course. Numbers before 10% waste; round up when ordering.
| Driveway Size | Area | Base (cu yd) | Base (tons) | Top (cu yd) | Top (tons) | Total (cu yd) | Total (tons) |
|---|---|---|---|---|---|---|---|
| 10' × 20' | 200 sq ft | 2.5 | 3.4 | 1.2 | 1.7 | 3.7 | 5.1 |
| 12' × 40' | 480 sq ft | 5.9 | 8.0 | 3.0 | 4.0 | 8.9 | 12.0 |
| 20' × 40' | 800 sq ft | 9.9 | 13.4 | 4.9 | 6.7 | 14.8 | 20.1 |
| 12' × 100' | 1,200 sq ft | 14.8 | 20.0 | 7.4 | 10.1 | 22.2 | 30.1 |
| 20' × 100' | 2,000 sq ft | 24.7 | 33.4 | 12.3 | 16.7 | 37.0 | 50.1 |
Densities used: CA6 base ≈ 2,650 lb/yd³ (1.325 tons), #57 top ≈ 2,750 lb/yd³ (1.375 tons). Add 10% waste for compaction and spillage — that's the number you actually order.
🔢Recommended depth & material by use case
Not every driveway needs the same build. A light-duty suburban drive is very different from a rural lane carrying truck traffic through clay soil. Pick the spec that matches yours.
Light car, firm soil
4" base + 2" top = 6"
ABC/CA6 base, #57 top
Standard residential spec. Handles cars and small SUVs.
RV / truck / heavy use
6" base + 3" top = 9"
ABC/Class 5 base, #57 top
Add geotextile fabric on soft clay soil.
Rural lane, soft soil
8"–12"
#4 stone deep base + ABC + #57 top
Three-layer build; consult local road specs.
Refresh over existing base
2"–3"
#57 stone or pea gravel
Skip base layer; top up only the surface course.
Decorative path
1"–2"
Pea gravel, river rock, or DG
No base needed for pedestrian-only areas.
🎯What moves driveway cost — and by how much
Two contractors quoting the same driveway can differ by 30–50%. These are the line items that move the total — ask each quote to spell them out separately.
| Factor | Typical Impact | Notes |
|---|---|---|
| Site slope / grading | +$500–$2,000 | Steeper or uneven ground requires more excavation and grading before stone goes down. |
| Old driveway removal | +$1–$3 / sq ft | Demolition and disposal of existing asphalt, concrete, or gravel. |
| Base layer on soft soil | +$1–$3 / sq ft | Clay or peat soil needs excavation and geotextile before the base stone. |
| Drainage work | +$500–$3,000 | Trench drains, culverts, or regrading to move water away from the garage. |
| Regional labor rates | ±30–50% | Northeast and West Coast run higher; South and Midwest are the national mid-market. |
| Access and haul distance | +15–35% on small jobs | Tight lots needing small equipment, or rural sites far from the quarry, cost more per sq ft. |
The base is the driveway. Most premature driveway failures are base failures, not surface failures. If the soil is soft or the existing base is questionable, that's the line item worth paying for — an extra inch of surface material over a bad base buys you nothing. When comparing quotes, ask for base depth in writing.
🗺️Driveway cost by US region (2026)
National averages are useful, but regional labor rates and material transport change the price considerably. These installed cost ranges include labor, base prep, and materials — excludes old driveway removal and permits.
| Region | Asphalt / sq ft | Concrete / sq ft | Gravel / sq ft | Notes |
|---|---|---|---|---|
| Southeast (FL, GA, NC, SC, TN) | $6–$10 | $7–$14 | $1.50–$4 | Competitive market, mild winters, good asphalt supply. |
| South Central (TX, OK, AR, LA) | $6–$10 | $7–$14 | $1.50–$4 | Low labor + high contractor density = best value. |
| Midwest (OH, MI, IL, IN, WI) | $7–$11 | $8–$16 | $2–$5 | National mid-market benchmark — freeze-thaw affects asphalt. |
| Mountain West (CO, AZ, NV, UT) | $7–$12 | $8–$16 | $2–$5 | Higher transport costs; altitude rarely a factor. |
| Mid-Atlantic (PA, VA, MD, NJ) | $8–$13 | $9–$17 | $2–$5 | Dense metro areas drive labor rates up. |
| Northeast (NY, MA, CT, RI) | $9–$14 | $10–$20 | $2.50–$6 | Highest labor + worst freeze-thaw = asphalt needs sealcoat every 3 yrs. |
| West Coast (CA, WA, OR) | $10–$16 | $12–$22 | $3–$7 | Most expensive; permits + seismic codes add cost. |
Southeast & South Central are the best value zones. High contractor density + mild winters + strong local material supply keep prices 20–30% below Northeast and West Coast. A two-car asphalt drive that costs $8,000–$10,000 in NYC or LA runs $5,000–$7,000 in Houston or Atlanta.
Get at least 3 written quotes. Prices vary 30–50% between contractors for the same job. Schedule during off-peak seasons (late fall, early spring) for better rates, and ask each quote to specify material, depth, base layer, grading, and what removal is included.
🏗️Why two layers of gravel? The science of driveway structure
A driveway is a pavement system — even gravel ones. Every professional installation uses a base layer and a surface layer, each with its own job. Here's why mixing them into one big pile doesn't work.
①Base Layer — structural foundation
The base carries all the weight — cars, trucks, RVs, even snow plows. It needs:
- ✓ Angular crushed stone (not smooth river rock) — angular particles interlock under pressure
- ✓ Fines mixed in — small particles (clay/silt) fill voids so the whole mass compacts into rock
- ✓ Dense gradation — ABC, CA6, Class 5, or 21AA. These are the spec materials, not "crushed stone" from the gravel yard
- ✓ Plate-compacted in 2–3 inch lifts — never compact a 6-inch pile all at once
Standard depth: 4 inches for cars, 6 inches for heavy clay soil / RVs
②Top Layer — traffic surface & decoration
The top layer is what tires actually contact. It needs to stay put, drain water, and look good:
- ✓ Clean stone — #57 crushed stone, #8, or pea gravel. No fines!
- ✓ Free-draining — water runs through to the base instead of pooling on the surface
- ✓ Traps base fines — the smaller top gravel catches any fines that migrate up through the base
- ✓ Comfortable to walk on — pea gravel is softer than angular crushed stone
Standard depth: 2 inches for standard surfaces, 1 inch for decorative paths
📏How to measure a driveway — even the odd-shaped ones
Straight rectangles are easy. Real driveways curve, widen at the road, and turn into parking pads. Here's how to get accurate square feet measurements every time for your gravel driveway calculator input.
Measure the long run
Length from street to garage door or parking pad. Use a 100 ft tape measure or measuring wheel; laser meters work well for shorter drives.
Measure the average width
Driveways are rarely constant width — measure at the street, middle, and garage end, then average. Single-car: 10–12 ft; two-car side-by-side: 20–24 ft.
Add flares and aprons
The trumpet-shape flare at the street and apron in front of the garage add 5–15% to the area. Treat them as separate rectangles or triangles.
Split odd shapes into rectangles
Curved drives: measure length along the centre line and multiply by width. Parking pads/turnarounds: split into separate rectangles or use the Circle shape in the calculator.
Pick your depth
6" total for a single-depth refresh, or run the calculator twice (4" base + 2" top) for a proper two-layer build.
Add a waste buffer
10% is standard. Bump to 15% if sloped, curved, or on soft ground — compaction settling and spillage always happen.
Quick shape hacks
- Curved drives: measure length along the centre line and multiply by width. An approximation — the extra for compaction covers any difference.
- Parking pads / turnarounds: treat as a second rectangle (or use the Circle shape in the calculator). Draw the boundary where sections truly meet.
- Flares at the street: the trumpet-shaped mouth is a triangle or trapezoid — usually adds 5–15% to the total area.
Don't forget the crown. A slight crown (1/4" rise per foot of width) sheds water to both sides. A perfectly flat driveway holds water, softens the base, and accelerates rutting.
🔧How to keep gravel where you put it — edge restraint options
Gravel's one bad habit is migration — onto the lawn, into the street, down the slope. The fix is an edge restraint. Four options, in rising order of permanence.
| Option | Effort | How Well It Holds | Cost / ft | Notes |
|---|---|---|---|---|
| Steel / aluminium landscape edging | Low | Good — flat drives, nearly invisible | $1.50–$3.00 / ft | Stake into place; rust-resistant aluminium for coastal areas. |
| Treated timber or railroad ties | Medium | Strong — suits rustic/rural drives | $3.00–$6.00 / ft | Bury partially for stability; will rot in 8–12 years. |
| Concrete curb or poured border | High | Most permanent — frames the drive visually | $8.00–$20.00 / ft | Adds major curb appeal; can double as a flower bed edge. |
| Paver border course | High | Very strong; decorative | $10–$25 / ft | Lay a row of pavers beside the gravel; joint-sand locks them. |
Without edge restraint, gravel spreads into the lawn at roughly one ton per year on a typical 600 sq ft drive. A $200 metal edging install pays for itself in saved lawn mower blade replacements and saved gravel top-ups.
🌍Climate decides more than you think
Asphalt, concrete, and gravel all behave differently depending on where you live. Freeze-thaw cycles, sustained heat, and salt air each change what material and depth makes sense.
Northern / Freeze-Thaw
Best surface: Asphalt (flexes with frost)
Base spec: 6–8" ABC base
Top course: 2" #57 stone
Avoid: Pea gravel as surface — rolls under tire weight after freeze cycles
Tip: Extra base depth absorbs frost heave that would otherwise rut the surface.
Southern / Hot-Dry
Best surface: Concrete (handles sustained heat)
Base spec: 4" ABC base
Top course: 2" #57 or DG
Avoid: Dark asphalt — softens in extreme heat, shortens life
Tip: Lighter aggregate colours (DG, limestone) reflect UV, stay cooler.
Coastal / Salt-Air
Best surface: Concrete or pavers
Base spec: 4" CA6 base
Top course: 2" granite-based aggregate
Avoid: Galvanized steel edging — rusts in 5–7 years near saltwater
Tip: Switch to aluminium or composite edging; limestone weathers faster in salt air.
⚠️Six driveway mistakes that guarantee failure
We reviewed 100+ contractor estimates and DIY forum horror stories to identify the patterns that cause every common driveway failure. These are the mistakes to avoid — and they're all preventable.
Single thick lift — doesn't compact through
Pouring 6 inches of base in one pile and trying to compact it leaves the bottom 3 inches loose. Freeze-thaw cycles lift the surface into rolling waves within 2–3 years. Always spread 3–4 inch lifts and compact each separately with a plate compactor or roller.
No base layer on clay soil
Laying #57 stone directly on graded clay looks right on day one but sinks into mud after the first rainy season. The base stone (ABC/CA6) is structural, not optional — it carries vehicle weight and prevents surface stone from pumping down into the subgrade.
No edge restraint — stone migrates
Without a physical edge (steel, timber, or concrete curb), gravel spreads into the lawn at roughly one ton per year on a typical 600 sq ft drive. Your lawn mower blades will thank you for a $200 metal edging install.
Using pea gravel or river rock as surface
Round gravel looks attractive in landscape beds but has zero interlock. It scatters under tire spin, leaves wheel ruts, and requires regrading every 6–12 months. Angular crushed stone (#57, #8) is the only practical surface for daily traffic.
Flat surface — no crown for drainage
A perfectly flat driveway holds water, which softens the base and accelerates rutting. Build a slight crown: roughly 1/4 inch of rise per foot of width (so a 12 ft drive is 3 inches higher in the middle). Water sheds to both sides instead of pooling.
Ordering by volume when supplier sells by weight
Ton-to-yard conversion depends on your specific stone's density — anywhere from 1.3 to 1.6 tons per cubic yard. Always confirm your supplier's density and enter it as a Custom Density in the calculator. Getting this wrong by 0.1 tons/yd³ on a 15-yard order = 1.5 tons short.
Geotextile fabric is cheap insurance. On any soft or clay soil, lay woven geotextile between the soil and the base stone. It costs $0.50–$1.50 per sq ft and doubles the practical lifespan of your driveway. It's the one upgrade DIYers most regret skipping.
❓Frequently Asked Questions
The questions we get most often from people planning a new driveway — answered with real numbers and practical advice.