Asphalt is ordered by weight. Enter the area to be paved and the compacted thickness to estimate the tons of hot mix asphalt needed and, optionally, the material cost.
The default density of 145 lb per cubic foot (3,915 lb/yd³, about 2.32 t/m³) is typical for compacted hot mix asphalt.
Formula
Tons = Area (ft²) × Thickness (ft) × 145 lb/ft³ ÷ 2,000
In metric: tonnes = area (m²) × thickness (m) × 2.32 t/m³.
Worked example
A 12 ft × 10 ft area paved 3 inches thick: 120 × 0.25 = 30 ft³ × 145 lb/ft³ = 4,350 lb, or about 2.18 tons (2.28 tons with 5% extra).
Typical asphalt thickness
Residential driveways are usually 2–3 inches (5–7.5 cm) of compacted asphalt over 4–8 inches of compacted aggregate base. Heavier traffic needs more.
Frequently asked questions
How much does a ton of asphalt cover?
At 2 inches thick, one ton covers about 80 ft²; at 3 inches, about 55 ft².
Do I need a base under asphalt?
Yes. A compacted gravel or road-base layer carries the load and drains water; skipping it is a common cause of cracking.
Last updated · Calculations checked by automated tests· Editorial policy