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Asphalt Calculator

Calculate tons of asphalt for any driveway, parking lot, or paving project. Get tonnage and cost estimates instantly.

Price per Ton (optional)

$

Enter your supplier's quote per ton for an exact cost estimate.

How to Use This Calculator

Enter your project length and width in feet. Set depth in inches: 2 to 3 inches is standard for residential driveways; 4 inches for commercial driveways and parking lots; 6 inches for heavy truck traffic. Select Hot Mix Asphalt for new installations. Choose Asphalt Millings if you are using recycled material for a base layer or a low-traffic drive. The result shows tons to order with a 10% waste allowance included. Enter your asphalt supplier's quoted price per ton to get a total cost estimate. For L-shaped driveways or projects with an irregular shape, calculate each rectangular section separately and add the tonnage totals. Call your paving contractor or batch plant with the ton figure; they will confirm based on their specific mix density.

How to Calculate Asphalt Tonnage

Formula: Tons = (Length × Width × Depth in inches / 12) × Material Density / 2000.

Hot mix asphalt weighs approximately 145 lbs per cubic foot. Millings weigh about 110 lbs per cubic foot.

Example: a 40×12 driveway at 3 inches deep using hot mix asphalt. Step 1: cubic feet = 40 × 12 × (3/12) = 120 ft³. Step 2: raw tons = 120 × 145 / 2000 = 8.7 tons. Step 3: with 10% waste = 8.7 × 1.1 = 9.57 tons. Order 10 tons.

One ton of compacted hot mix asphalt covers approximately 80 square feet at 2 inches, 55 square feet at 3 inches, or 40 square feet at 4 inches. These are rough reference figures; actual coverage depends on the specific mix and compaction rate.

Compaction note: asphalt compacts approximately 20 to 25 percent when rolled. The calculator accounts for compaction by using the density of compacted material (145 lbs/ft³), not loose material. Always add the 10% waste factor to your final order.

Asphalt Tips

Match depth to traffic load. For a residential driveway that only sees passenger vehicles: 2 to 3 inches of hot mix over 4 to 6 inches of compacted aggregate base is the industry minimum. For vehicles over 6,000 lbs, use 4 inches of HMA. For truck traffic or commercial use, specify 4 to 6 inches over a deeper base.

Consider millings for low-traffic or budget applications. Asphalt millings are recycled material from road surfaces and cost 50 to 70 percent less than fresh hot mix. They compact well, shed water, and are durable enough for most residential driveways. Millings do not bind as firmly as HMA and may need regrading every few years in heavy-traffic areas.

Always pave over a compacted aggregate base. Asphalt laid directly on uncompacted soil will crack and rut within the first freeze-thaw cycle. A 4-inch compacted gravel base is the minimum for any new asphalt installation. If you are resurfacing over existing asphalt, the old surface must be stable and free of soft spots.

Get at least two quotes. Asphalt pricing varies widely by region, season, and crude oil prices. Batch plant prices drop in summer and spike in fall when paving season ends. Locking in a price in late summer usually beats waiting until fall for the same project.

What to Buy

For a full new driveway or parking lot: contact local paving contractors for hot mix asphalt. This is not a DIY-friendly material; it must be delivered hot (300°F+) and placed within 30 minutes. Most contractors quote per square foot installed and include base work. Get at least two quotes: prices vary more for asphalt than for most other materials.

For pothole repair and patches under 10 square feet: cold patch asphalt in 50-pound bags is available at hardware stores. Brands include Quikrete, Sakrete, and QPR. Cold patch is a permanent repair in dry conditions but not as durable as hot mix for high-traffic areas.

For a budget driveway or rural access road: asphalt millings (also called recycled asphalt or RAP) are available from paving companies and some landscape suppliers. Call local paving contractors; they often sell millings from road work at well below hot mix prices. Delivery minimums vary but many suppliers will deliver 3 to 5 tons minimum.

Frequently Asked Questions

How do I calculate tons of asphalt needed? +
Formula: Tons = (Length × Width × Depth in inches / 12) × 145 / 2000. For hot mix asphalt, use a density of 145 lbs per cubic foot. Example: a 20×20 area at 3 inches: 20 × 20 × (3/12) = 100 cubic feet × 145 / 2000 = 7.25 tons. Add 10% waste: 7.98 tons. Round up to 8 tons when ordering.
How much area does 1 ton of asphalt cover? +
One ton of hot mix asphalt covers approximately 80 square feet at 2 inches thick, 55 square feet at 3 inches, 40 square feet at 4 inches, or 27 square feet at 6 inches. These figures use a compacted density of 145 lbs per cubic foot. Actual coverage varies slightly by mix type and compaction rate. Use the calculator for precise project-specific quantities.
How thick should a residential driveway be? +
For a standard residential driveway with only passenger vehicle traffic, 2 to 3 inches of hot mix asphalt over a 4-inch compacted aggregate base is the industry minimum. Most contractors recommend 3 inches for durability. For SUVs and pickups that regularly park on the driveway, use 4 inches. Commercial driveways that see delivery trucks should be 4 to 6 inches.
What is the difference between hot mix asphalt and asphalt millings? +
Hot mix asphalt (HMA) is fresh material produced at a batch plant and delivered hot. It is the standard for new driveways, roads, and parking lots. Asphalt millings are recycled material ground from existing road surfaces. They are gray to black, cost 50 to 70 percent less than fresh HMA, and compact well. Millings are suitable for rural driveways and low-traffic applications but do not form as smooth or durable a surface as hot mix.
How much does asphalt cost per ton? +
Hot mix asphalt costs $80 to $160 per ton for material delivered from a batch plant, depending on your region and oil prices. Installed cost (contractor-paved, including base) runs $2 to $6 per square foot for residential driveways. Asphalt millings cost $10 to $30 per ton delivered. Prices peak in fall and drop in early summer; scheduling paving work in May through July typically gets you the best pricing.
How many tons of asphalt do I need for a 2-car driveway? +
A typical 2-car driveway (20×40 feet, 800 sq ft) at 3 inches deep needs about 29 tons of hot mix asphalt with a 10% waste factor. At 4 inches deep, the same driveway needs 39 tons. Use the calculator above with your specific dimensions for a precise figure. Note that the driveway also needs a 4-inch compacted gravel base, which requires a separate gravel calculation.
Can I use asphalt millings for a driveway? +
Yes. Asphalt millings work well for residential driveways, especially in rural areas or where appearance is less important. They compact into a reasonably stable surface that sheds water. The main trade-offs: millings remain somewhat loose on the surface compared to hot mix, they can track black residue onto shoes in hot weather, and they may need regrading every 2 to 3 years under regular vehicle traffic.
What is a compaction factor for asphalt? +
Hot mix asphalt compacts approximately 20 to 25 percent when rolled. A 4-inch layer of loose asphalt compacts to about 3 inches after rolling. This means you need to apply more loose material than the final desired depth. Contractors account for this with their paving machines. When calculating tonnage, use the final compacted density (145 lbs/ft³ for HMA) and your target finished depth. The 10% waste factor in this calculator also covers compaction variation.

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