Asphalt Calculator
The Asphalt Calculator estimates the tonnage of hot-mix asphalt needed for a driveway or parking area based on its dimensions and desired thickness.
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How This Tool Works
Enter your driveway or lot's length, width, and thickness to calculate the estimated tonnage of asphalt needed.
Formula & Method
Volume (cubic feet) = area × (thickness in inches ÷ 12). Tons ≈ cubic feet × 145 lb/cu ft ÷ 2,000 (standard hot-mix asphalt density).
Example Calculation
A 20×40 ft driveway (800 sq ft) at 3 inches thick needs about 14.5 tons of asphalt.
Frequently Asked Questions
How thick should an asphalt driveway be?+
Residential driveways typically use 2–3 inches of asphalt over a compacted gravel base; commercial areas with heavier traffic often need 4+ inches.
Is this the same as the base layer?+
No, this estimates the asphalt surface layer only. The gravel base beneath it should be calculated separately with our Gravel Driveway Calculator.
How long does asphalt take to cure?+
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.
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