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Asphalt Calculator

Calculate how much asphalt you need for a driveway or paved area. Enter your dimensions and compacted depth to get volume and estimated tons of hot mix — with waste allowance, a configurable density, and an optional cost estimate.

Updated 2026-09-14
Area
ft
ft
in

Driveways typically 2–3 in compacted

%

Covers handling and edges.

lb/ft³

Compacted hot mix: 140–150

$

Use local hot-mix pricing

Compacted depth is what you order

Asphalt is quoted and sold by compacted tons, but it goes down loose and gets rolled to final thickness — losing roughly 20–25% of its height in the process. Enter the finished, compacted depth here (2–3 inches is typical for residential driveways) and let the paver worry about the loose lay rate. A 40 × 12 ft driveway at 3 inches compacted works out to about 8.7 tons before waste.

Why contractor quotes differ from this number

This is a material estimate. A real paving quote includes excavation, the aggregate base (usually 4–8 inches of compacted stone — the part that actually determines how long the driveway lasts), grading for drainage, tack coats on overlays, hand-work at edges and transitions, and mobilization of a crew and equipment. Material is often less than half the total. If a quote's tonnage differs a little from this estimate, that's normal; if it differs wildly, ask why.

Density varies by mix — most hot mixes land between 140 and 150 lb/ft³ compacted. If your supplier quotes a specific density or a lb/yd²-per-inch rate, plug it in for a tighter number.

Asphalt to order
—
Includes waste allowance, rounded up
Surface area
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Volume (cubic feet)
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Volume (cubic yards)
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Volume (cubic meters)
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Estimated weight (before waste)
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Estimated material cost
—

Density: 145 lb/ft³ compacted

Convert cubic yards ↔ tons for other materials

Common questions

How much asphalt do I need for a driveway?

Multiply length × width × compacted depth in feet, then multiply by 145 lb per cubic foot and divide by 2,000 for tons. A 40 ft × 12 ft driveway at 3 inches compacted is 40 × 12 × 0.25 = 120 cubic feet, about 8.7 tons before waste.

How many tons of asphalt cover 1,000 square feet?

About 6 tons at 2 inches compacted, 9 tons at 3 inches, and 12 tons at 4 inches. The rule of thumb is roughly 110–112 lb per square yard for each inch of compacted depth.

How thick should an asphalt driveway be?

Two to three inches of compacted surface course over a prepared aggregate base is typical for residential driveways. Heavier use — RVs, delivery trucks — calls for 3–4 inches and a deeper base. The base matters as much as the asphalt; it is what stops the surface cracking.

Is asphalt sold by the ton or by the yard?

By the ton, essentially everywhere. Suppliers quote compacted tons, which is why this calculator asks for compacted depth — loose asphalt is laid about 25% thicker and compacts down to the depth you specify.

Why is a contractor quote higher than the material estimate?

This tool prices material only. A paving quote also covers excavation, base preparation, tack coat, edge work, compaction equipment, and mobilization — often more than the asphalt itself on a small driveway.

How this is calculated

Method
Volume = length × width × compacted depth, with dimensions normalized to feet (or meters in metric mode).
Weight = volume × density. The default 145 lb/ft³ is a common planning figure for compacted hot-mix asphalt.
Tons to order = weight × (1 + waste allowance), rounded up to the next 0.1 ton.
Cost = tons to order × your price per ton, when a price is provided.
Assumptions
  • Density is set to 145 lb/ft³ (≈ 2.32 t/m³) for compacted hot mix; real mixes run roughly 140–150 lb/ft³ — adjust it if your supplier quotes a different figure.
  • Depth means compacted depth. Loose asphalt is laid about 25% thicker and compacts down; suppliers quote by compacted tons.
  • Typical residential driveways use 2–3 in of compacted asphalt over a prepared aggregate base; this tool does not size the base or address structural/drainage design.
  • Contractor quotes include base preparation, tack coats, edges, and mobilization — expect them to differ from a bare material estimate.
Sources
  • National Asphalt Pavement Association (NAPA) — mix density guidance — Compacted hot-mix asphalt is commonly estimated at 140–150 lb/ft³ (≈ 110–112 lb/yd² per inch of depth).
Methodology reviewed 2026-09-14 · See our methodology for how we build and test calculators.
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