How much asphalt do I need?
Asphalt is ordered by weight, so we turn the paved volume into tons:
Tons = area × thickness (ft) × density ÷ 2,000
Multiply length by width for the area, multiply by the thickness in feet (inches ÷ 12) to get cubic feet, then by about 145 lb per cubic foot — the weight of compacted hot mix — and divide by 2,000 to get tons. As a rule of thumb, one ton covers about 80 square feet at 2 inches thick.
Recommended thickness
| Use | Asphalt thickness |
|---|---|
| Residential driveway | 2–3 in over 4–8 in base |
| Parking area / light commercial | 3 in over 6–8 in base |
| Overlay on sound asphalt | 1.5–2 in |
| Heavy / truck traffic | 4 in+ (engineered) |
The layers of a driveway
A lasting asphalt driveway is built up in layers — the asphalt you see is only the top:
- Subgrade. The native soil, graded and compacted. Soft or clay soil may need a deeper base or a geotextile.
- Aggregate base. 4–8 in of compacted crushed stone that carries the load and drains — size it with our gravel calculator.
- Asphalt mat. 2–3 in of compacted hot mix for a residential drive; heavier use gets a binder course plus a surface course.
Asphalt vs. concrete
Asphalt is cheaper up front, flexes with freeze-thaw, and can be resurfaced — but it needs sealing every few years and lasts about 15–20 years. Concrete costs more and can crack, but lasts 25–30+ years with little upkeep. See our guides on asphalt vs. concrete driveways and the cost to pave a driveway.
Good to know
- The base does the work. A well-compacted gravel base prevents cracking and rutting — size it with our gravel calculator.
- Order by compacted tons. Loose mix compacts roughly 20%, so don't under-order; a little extra is cheap insurance.
- Hot mix is a pro job. It arrives hot and must be spread and rolled fast. For full paving, hire a crew; save DIY for cold-patch repairs.
- Seal it later. Let new asphalt cure 6–12 months, then sealcoat it — plan that with our driveway sealer calculator.
Caring for a new asphalt driveway
Asphalt lasts longest when you stay ahead of small problems. A new driveway needs to cure 6–12 months before its first sealcoat — seal too early and you trap the oils that still need to evaporate. After that, reseal every 2–3 years (not yearly), and fill cracks promptly before water gets in, freezes, and widens them. For the first few weeks the mat is still soft: keep heavy vehicles and trailer jacks off it, avoid sharp turns of the wheels while parked, and don't park in the same spot every day in hot weather. Supporting the edges with soil or gravel keeps them from crumbling, since unsupported asphalt edges are the first thing to fail.