Asphalt Calculator

Residential driveways typically use 2–3 inches (5–7.5 cm) of asphalt over a compacted gravel base; commercial areas with heavier traffic often need 4+ inches (10 cm+).

Yes — switch the unit toggle to Metric and enter your area in meters with the thickness in centimeters. Weight is returned in tonnes and volume in cubic meters.

No, this estimates the asphalt surface layer only. The gravel base beneath it should be calculated separately with our Gravel Driveway Calculator.

Asphalt is typically firm enough to walk on within a day but can take 6–12 months to fully cure — avoid heavy loads or sharp turns during that period.

Because the calculator computes weight through the U.S. side of the math first — converting your metric dimensions to feet and inches, calculating tons using the 145 lb/cu ft density, then converting that tonnage to tonnes — rather than applying a flat 2.32-tonnes-per-cubic-meter figure directly. The two approaches land within a few hundredths of a tonne of each other, well inside the margin of error for any density estimate.

For material, yes — cubic feet and tons both scale linearly with thickness, so going from 3 inches to 6 inches exactly doubles the estimated tonnage. Labor and compaction costs don't necessarily scale the same way, since thicker pours are often laid in multiple compacted lifts rather than a single pass.