Calculate asphalt weight and bitumen quantity from square feet area. Enter length × width or total area in sq ft for instant tonnage estimates.
Enter your area in square feet using length × width, or input total sq ft directly. Works for driveways, parking lots, roads, and more.
Standard HMA density is approximately 145 lb/ft³ (2320 kg/m³). Adjust for open-graded or SMA mixes which differ slightly.
Results shown in short tons and pounds (imperial) as well as metric tonnes. Bitumen and aggregate quantities calculated separately.
Enter dimensions to calculate
Estimated tonnage at standard HMA density (145 lb/ft³ / 2320 kg/m³). Add 5–10% for compaction and wastage.
| Thickness | Tons / 1,000 sq ft | Short Tons / 1,000 sq ft | Typical Application |
|---|---|---|---|
| 1.5 in (38 mm) | 6.0 t | 6.6 st | Thin overlay / maintenance |
| 2 in (50 mm) | 8.0 t | 8.8 st | Residential driveways |
| 2.5 in (64 mm) | 10.0 t | 11.0 st | Parking lots / light roads |
| 3 in (75 mm) | 12.0 t | 13.2 st | Collector roads / heavy use |
| 4 in (100 mm) | 16.0 t | 17.6 st | Arterial / industrial |
The imperial formula converts area and thickness to volume in cubic feet, applies density, then divides by 2,000 to reach US short tons.
Multiply your area by the thickness converted to feet. Example: 1,000 sq ft × 2 inches ÷ 12 = 166.7 ft³. For a 20 ft × 50 ft driveway at 2 in, that's exactly 1,000 sq ft. Use feet and inches consistently to avoid conversion errors.
Multiply volume by the asphalt bulk density. Standard HMA is approximately 145 lb/ft³. 166.7 ft³ × 145 lb/ft³ = 24,167 lb. This is the weight in pounds before converting to the unit your supplier quotes in.
Divide by 2,000 to get US short tons: 24,167 ÷ 2,000 = 12.08 short tons. Add 10% waste → order 13.3 tons. To convert to metric tonnes, multiply by 0.907: 12.08 × 0.907 = 10.96 t. See the Square Metres Calculator to work natively in metric.
For standard HMA at 2 inches thick, a useful rule of thumb is approximately 1 ton per 80 sq ft. At 3 inches, it's 1 ton per 55 sq ft. At 4 inches, 1 ton per 40 sq ft. These rules are based on 145 lb/ft³ density and already include a small overage factor. Always confirm with your supplier's mix design for critical projects. The Tonnage Calculator gives full metric and imperial results with mix type presets.
Imperial unit paving projects across the US rely on sq ft inputs to estimate tonnage and cost.
A standard single driveway in the US is 9–12 ft wide and 18–20 ft long (162–240 sq ft). A double driveway runs 18–24 ft wide. Most residential driveways use 2–3 inches of compacted HMA over a compacted gravel base. A 400 sq ft double driveway at 2.5 inches requires approximately 6 short tons of asphalt mix. See the Cost Calculator to convert this to a dollar estimate using your local price per ton.
Commercial parking lots typically use 3–4 inches of surface HMA over a binder course for light vehicles, or up to 6 inches total pavement depth for heavy trucks and buses. A 10,000 sq ft lot at 3-inch HMA requires approximately 181 short tons. Calculate each zone separately if different areas have different thickness requirements — pedestrian areas (2 in), drive lanes (3 in), truck aprons (4 in). Use the Sq Ft to Tons Calculator for a fast conversion.
Road crews use sq ft calculations to estimate the tonnage needed for resurfacing projects. A 1.5–2 inch overlay on a residential street of 1,320 ft (¼ mile) × 24 ft wide = 31,680 sq ft. At 1.5 inches and 145 lb/ft³, that's approximately 182 short tons. Mill and fill projects add the milled depth (also calculated in sq ft) — confirm with the Repair Calculator for patch areas and the Tonnage Calculator for full road jobs.
More tools to help with your asphalt estimation project.
Measure the length and width of your paving area in feet and multiply them to get square feet. For irregular shapes, break the area into rectangles, calculate each, and add the totals together. A standard two-car driveway is typically 400–600 sq ft.
Enter your desired compacted asphalt thickness in inches. Residential driveways typically use 2–3 inches, while commercial lots need 4–6 inches. The default density of 145 lb/ft³ suits standard hot mix asphalt; adjust if your mix spec differs.
The calculator converts your square footage to US tons automatically using the formula: (area × thickness in feet × density) ÷ 2000. Add 5–10% to your order to allow for edge trimming, compaction variation, and waste at the delivery point.
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.