Square Feet Asphalt Calculator

At a 2-inch compacted thickness and a density of 145 lb/ft³, one US ton covers approximately 80–82 square feet. At 1 inch thick, that same ton covers around 160 sq ft. Thicker lifts and denser mixes will reduce coverage per ton, so always confirm coverage with your supplier's mix design data.

Standard hot mix asphalt (HMA) in the US has a compacted density of 140–150 lb/ft³, with 145 lb/ft³ used as the common default. Open-graded mixes, stone matrix asphalt (SMA), or RAP blends may have slightly different densities. If your contractor has a mix design, use the bulk specific gravity (Gmb) from that document for the most accurate result.

Always enter your finished, compacted dimensions. Asphalt is ordered and delivered by the compacted ton, and contractors quote based on finished thickness. Loose mat asphalt is typically 20–25% thicker before rolling, but that's handled automatically during paving — you just need to specify the finished depth you want.

One US short ton equals 0.907 metric tonnes. If the calculator returns 10 US tons, that equals approximately 9.07 metric tonnes. Many suppliers in Canada and Australia quote in metric tonnes, so this conversion matters when comparing quotes across borders. Our metric calculator handles SI units natively if you prefer to work in metres and tonnes from the start.

At the standard 2-inch compacted thickness and 145 lb/ft³ density: 1,000 sq ft × (2 ÷ 12) ft × 145 lb/ft³ ÷ 2,000 = 12.08 short tons. Adding a 10% waste factor gives a recommended order of 13.3 short tons. At 3 inches thick, you'd need approximately 18.1 short tons (order 20 tons). A 1,000 sq ft driveway is roughly 20 ft × 50 ft — a large single-car or narrow double driveway.

For residential driveways with passenger vehicles only, 2–2.5 inches of compacted HMA over 4–6 inches of compacted gravel base is standard in most US states. For commercial parking lots with regular passenger car traffic, use 3 inches of surface HMA over a 2-inch binder course. Areas with heavy trucks, garbage trucks, or regular delivery vehicles need at least 4 inches of HMA total, often with a 6–8 inch aggregate base. Inadequate thickness is the most common cause of early driveway failure — cracking and rutting typically start within 3–5 years if undersized.

Yes — break irregular shapes into rectangles and calculate each separately, then add the totals. For a curved driveway apron, approximate the curved section as a rectangle using the average width. For circular turning areas, use the area formula π × r² (then convert: 1 m² = 10.76 sq ft). For L-shaped driveways, split into two rectangles. A standard approach adds 10–15% extra on top of the calculated area for irregular shapes since hand-worked edges use more material than machine-paved straight runs. The Circular Calculator handles round or radius sections directly.