Pave firmly.
Tons of asphalt for any driveway or parking area. Accounts for typical 145 lb/ft³ density and standard compaction depths.
How we calculated this
The calculator multiplies area by compacted thickness to get volume, then converts volume to weight using asphalt's typical density of 145 pounds per cubic foot (hot-mix asphalt, after compaction). For metric, that's approximately 2.32 tonnes per cubic meter.
Rectangular areas use length × width. Circular areas (turnaround circles, cul-de-sacs) use π × radius². Enter the diameter in the length field and leave width alone — it's ignored for circular shapes.
Thickness is the finished, compacted thickness — not the loose lift thickness the crew shovels down. Hot asphalt compacts about 25% under the roller, so 4 inches of loose material becomes 3 inches compacted. When ordering, you want enough material for the compacted thickness; waste factor covers the compaction loss.
Standard compacted thicknesses: 2 inches for a residential overlay over existing asphalt or concrete; 3 inches for a new residential driveway on prepared base; 4 inches for driveways that bear trucks or RVs; 6 inches for parking lots with heavy truck traffic. Anything thicker than 6 inches is typically poured in multiple lifts.
Waste factor of 10% is standard — covers material that cools during transit, trimmings around edges, and the truck's 'last drop' that often isn't fully usable. Use 5% for simple rectangular driveways with a pumper or chute delivery; 15% for complex shapes or when material has to be wheeled to the site in buckets.
This calculator does not include: the gravel base layer under asphalt (typically 4-8 inches of compacted crushed stone — use the gravel calculator), edge forms, curbing, or drainage. A proper asphalt installation is asphalt + base + drainage planning + final sealing.
Sources
- National Asphalt Pavement Association (NAPA) — Industry standards for asphalt density and compaction
- Asphalt Institute — Pavement Design Guide — Thickness requirements by traffic loading
Frequently asked
How many tons of asphalt do I need for a 50×12 driveway?
For a 50×12 ft driveway at 3 inches compacted thickness with 10% waste, you need about 12 tons of hot-mix asphalt. At 4 inches (for heavier vehicles), 16 tons. The calculator above handles different shapes and thicknesses.
How thick should my asphalt driveway be?
3 inches compacted for standard passenger-car driveways on properly prepared 4-6 inch gravel base. 4 inches for driveways that see heavy trucks, RVs, or have marginal subgrade. 6 inches for commercial parking lots. Going thinner saves money short-term but dramatically shortens pavement life.
What's the difference between tons and cubic yards of asphalt?
Asphalt is sold by the ton (weight) because density is very consistent for hot-mix. 1 cubic yard ≈ 1.96 tons at typical compacted density. The calculator shows both so you can match whatever your supplier quotes.
How much does asphalt cost?
In 2025-2026 US market: $100-170 per ton delivered and placed for hot-mix asphalt driveways. Small jobs (under 10 tons) carry a minimum charge. Parking lots and large commercial jobs run $80-120 per ton. Sealcoating is separate ($0.10-0.25 per sq ft every 2-3 years).
Do I need a base under asphalt?
Yes — asphalt alone over dirt fails quickly. Standard residential: 4-6 inches of compacted crushed stone (#57 or #3) under 3 inches of asphalt. Frost-prone climates may need 8-10 inches of base. Skipping base saves initial cost but leads to cracking and sinking within 2-3 years.
Can I DIY an asphalt driveway?
Not really — hot-mix asphalt arrives at 275-300°F and must be placed and compacted within 1-2 hours before it cools below workable temperature. Cold patch asphalt (bagged product) is available for small pothole repairs and can be DIY'd, but it's not suitable for a full driveway — it never fully cures and lasts only 1-2 years.
When is the best time to lay asphalt?
Warm, dry weather: 50°F or above ambient temperature, dry surface, no rain in the forecast for 24 hours. In the US, April-October for most regions. Cold-weather placement is possible with 'warm mix' asphalt but is harder to compact properly and costs more.
How long before I can drive on it?
48-72 hours for light passenger-car use. 7 days before parking in the same spot repeatedly (asphalt continues to cure for weeks; heavy static loads can leave depressions). Sealcoating should wait 6-12 months to allow full cure before adding surface treatment.