Hot-mix asphalt weighs about 2.025 tons per cubic yard. For a driveway 20 ft long, 10 ft wide, and 2 inches thick, the volume is (200 × 2) / 324 ≈ 1.23 cubic yards, or roughly 2.5 tons. Enter length, width, and depth to get the volume in cubic yards, weight in tons, and the number of 50-lb bags for smaller patch jobs.
The Asphalt Volume Formula
Cubic yards = (Area in square feet × Depth in inches) / 324. The constant 324 converts square-foot-inches to cubic yards. Tons = Cubic yards × 2.025, based on standard hot-mix density. For metric inputs, the calculator converts meters and centimeters to imperial units internally before applying the formula.
Recommended Asphalt Thickness
Residential driveways typically need 2–3 inches of asphalt over a compacted gravel base. Commercial parking lots require 3–4 inches. Light-traffic pathways can get by with 1.5–2 inches. Thicker applications last longer but cost proportionally more — doubling the depth roughly doubles the material.
Ordering Tips
Order 5–10% more than the calculated amount to cover compaction loss and irregular subgrade. Hot-mix asphalt is sold by the ton from a batch plant, usually with a minimum order of 2–3 tons for delivery. For small repairs, cold-patch asphalt is sold in 50-lb bags at hardware stores — the bag count output is for that scenario.
FAQ
Q: How many tons of asphalt for a two-car driveway?
A: A typical two-car driveway is about 20 × 20 ft. At 2 inches thick: (400 × 2) / 324 = 2.47 cubic yards × 2.025 ≈ 5 tons. Add 10% for waste, so order about 5.5 tons.
Q: What is the difference between hot-mix and cold-patch asphalt?
A: Hot-mix is produced at a plant and must be laid while hot. It is the standard for new paving. Cold-patch comes in bags, can be applied at ambient temperature, and is designed for pothole repairs and small patches — not full paving.
Q: Does asphalt density vary?
A: Slightly. Standard hot-mix is about 145 lbs/ft³ (2.025 tons/yd³). Stone matrix asphalt (SMA) and porous mixes may differ by 5–10%. The calculator uses the standard density.