Asphalt Calculator
Calculate how many tons of asphalt you need, the supply and installed cost range, and the right thickness for your project. Supports rectangle, circle, triangle, and L-shaped areas — works in imperial or metric.
Asphalt thickness guide
Use these depths for common projects. Asphalt sits on top of a compacted gravel base — both layers matter.
| Application | Base course (gravel) | Surface course (asphalt) | Total depth |
|---|---|---|---|
| Footpath / walkway | 4 in | 1.5 in | 5.5 in |
| Residential driveway | 6 in | 2–3 in | 8–9 in |
| Light commercial lot | 6 in | 3 in | 9 in |
| Heavy traffic / trucks | 8–12 in | 4–5 in | 12–17 in |
Asphalt vs. concrete driveway cost
The most common question before any driveway install. Here's the side-by-side.
Full comparison table
| Factor | Asphalt | Concrete |
|---|---|---|
| Upfront cost | $3–5 / sq ft | $6–10 / sq ft |
| Lifespan | 15–20 years | 25–30 years |
| Maintenance | Seal coat every 3–5 years (~$0.15/sqft) | Occasional crack fill |
| Repair ease | Easy (resurface) | Harder (remove sections) |
| Heat tolerance | Softens in extreme heat | Does not soften |
| Cold tolerance | Better (flexes with frost) | Can crack in hard freeze |
| Color options | Black only | Gray, stained, stamped |
| DIY friendly | No (hot mix needs machinery) | Possible for small areas |
| Environmental | Up to 100% recyclable (RAP) | Less recyclable |
Going with concrete instead? Use our concrete calculator to get cubic yards, bag count (40/60/80 lb), and a 2026 cost estimate.
How to calculate asphalt tonnage
- Measure the area to be paved — length × width for a rectangle, in feet.
- Decide on asphalt depth — 2–3 inches for residential, 3–4 inches for commercial.
- Calculate cubic feet — area × thickness in feet (i.e., inches ÷ 12).
- Convert to tons — cubic feet × 145 (lb/ft³) ÷ 2,000.
- Add 5–10% for waste — uneven subbase, compaction, and ordering buffer.
Worked example: a 50×20 ft driveway at 2.5 inches = 1,000 sqft × 0.208 ft = 208 ft³ × 145 ÷ 2,000 = 15.1 tons. With 5% waste, order 16 tons.
How many tons of asphalt do I need?
Use the shorthand formula for any rectangle:
(Derivation: 145 lb/ft³ ÷ 2,000 lb/ton ÷ 12 in/ft = 0.00604 per sq ft per inch — the 0.0031 shorthand factors in compaction and gives an order-ready number for hot-mix.)
Pre-calculated driveway tonnage
| Driveway size | 2 in | 2.5 in | 3 in |
|---|---|---|---|
| 10 × 20 ft (200 sqft) | 1.5 tons | 1.8 tons | 2.2 tons |
| 12 × 40 ft (480 sqft) | 3.5 tons | 4.4 tons | 5.3 tons |
| 20 × 50 ft (1,000 sqft) | 7.3 tons | 9.1 tons | 10.9 tons |
| 24 × 60 ft (1,440 sqft) | 10.5 tons | 13.1 tons | 15.7 tons |
Asphalt cost per ton in 2026
- Hot-mix asphalt (HMA): $60–120 per ton, depending on market, distance from plant, and oil price.
- Delivery charge: typically $100–200 for short distances.
- Total material cost for a standard residential driveway: roughly $500–2,000.
- Installed price (labor + materials): $3–7 per square foot.
- Regional variation: South and Midwest are cheaper; Northeast and West Coast often run $5–10 per sq ft installed.
- Seasonality: prices spike in spring and fall (peak paving season). Winter quotes are usually lowest.
How thick should asphalt be?
Thickness depends on the load and the base. Skimping on either layer is the most common cause of premature failure.
- Residential driveway: 2–3 in asphalt over 6 in compacted gravel.
- Light commercial / parking: 3 in asphalt over 6 in base.
- Heavy traffic / trucks: 4–5 in asphalt over 8–12 in base — often in two lifts.
- Footpath / walkway: 1.5 in asphalt over 4 in base is sufficient.
The base course (compacted gravel or crushed stone) prevents settling and frost heave. Skipping it is the single most expensive mistake a homeowner can make.
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Frequently asked questions
How many tons of asphalt do I need for a driveway?
For a standard 600 sq ft (20×30 ft) residential driveway at 2.5 inches thick, you'll need about 9 tons. Use the shorthand: Area × Thickness (in) × 0.0031 = Tons.
How is asphalt tonnage calculated?
Tons = Area (sq ft) × Thickness (ft) × 145 lb/ft³ ÷ 2,000. Most installers add 5–10% for waste and compaction.
How thick should I lay asphalt on a driveway?
Residential: 2–3 inches of asphalt over a 6-inch gravel base. Commercial lots: 3–4 inches over 6 inches base. Heavy traffic: 4–5 inches over 8–12 inches base.
How much does a ton of asphalt cost in 2026?
Hot-mix asphalt costs $60–120 per ton in 2026, depending on region, distance from the plant, and oil prices. Delivery typically adds $100–200 for short hauls.
How much does it cost to pave a driveway with asphalt?
Installed asphalt runs $3–7 per square foot in the US. A standard 600 sq ft driveway is roughly $1,800–$4,200 installed. Coastal markets can run higher.
What is the formula for calculating asphalt tonnage?
Tons = Area (sq ft) × Thickness (in) × 0.0031. The 0.0031 factor incorporates the 145 lb/ft³ density, converts inches to feet, and divides by 2,000 lb/ton.
Can I lay asphalt myself?
Hot-mix asphalt requires a paver, roller, and an application temperature above 275°F. DIY is not realistic for full driveways — cold patch is suitable only for small repairs.
What is the density of asphalt in lb/ft³?
Compacted hot-mix asphalt has a density of about 145 lb/ft³ (2,322 kg/m³). Loose, uncompacted mix is roughly 110 lb/ft³ — but you order by compacted volume.
How long does an asphalt driveway last?
A properly installed asphalt driveway lasts 15–20 years with regular sealing every 3–5 years. Cutting corners on the base or sealing can shorten this to 8–10 years.
Should I choose asphalt or concrete for my driveway?
Asphalt is 30–50% cheaper upfront and handles cold climates better. Concrete lasts 25–30 years and resists heat. For most US climates, asphalt is the cost-effective default.
What is RAP (Reclaimed Asphalt Pavement)?
RAP is recycled asphalt pavement — milled from old roads and reused in new mixes. Asphalt is the most recycled material in the US by tonnage; many modern mixes contain 20–40% RAP.
How often does asphalt need to be sealed?
Seal coat new asphalt 6–12 months after install, then every 3–5 years. Seal coating costs about $0.15–0.25 per square foot.
What causes asphalt to crack?
Common causes: poor base preparation, water infiltration, freeze-thaw cycles, heavy loads, UV oxidation, and lack of seal coating. Most cracks start at the base — not the surface.