Asphalt Calculator

Estimate hot-mix asphalt tonnage for a driveway, parking area, or path. Enter your dimensions and compacted thickness to get tons, with an adjustable density to match your plant’s mix.

Asphalt Area Details

Length

Width

Thickness

Asphalt Density (compacted)

lb/ft³

Typical hot-mix asphalt runs 140–150 lb/ft³

Enter your paved area dimensions to see tons of asphalt needed.

The formula

Tons = Area ft² × Thickness in ÷ 12 × Density lb/ft³ ÷ 2000

Compacted hot mix runs 140–150 lb/ft³; the calculator defaults to 145 (about 2,325 kg/m³ in metric). Enter thickness as the finished compacted depth — the paving crew handles the roll-down from loose laid depth.

Typical thicknesses

Residential driveways: 2–3 inches of asphalt over 4–8 inches of compacted base. Overlays on existing pavement: 1.5–2 inches. Commercial lots: 3+ inches per the traffic design. The base under the asphalt matters as much as the asphalt itself — see the base rock calculator.

Frequently Asked Questions

How many tons of asphalt do I need for a driveway?

A 40×12 ft driveway at 2 inches compacted is about 5.8 tons. Enter your dimensions above for an exact figure.

How much area does a ton of asphalt cover?

At 2 inches compacted, roughly 80 square feet per ton; at 3 inches, about 55 square feet.

What’s the difference between loose and compacted asphalt thickness?

Hot mix compacts roughly 20–25% under rolling, so crews lay about 2.5 inches loose to finish at 2 inches. Order by the compacted (finished) thickness — this calculator already works that way.