Free tool
Asphalt Calculator
Enter the area, thickness, and mix density and get exactly how much asphalt you need — in tons, the way the plant sells it — plus volume and a material-cost ballpark. Free, no signup.
Asphalt needed
0 tons
- Coverage area0 ft²
- Volume (cubic feet)0 ft³
- Tons of asphalt0 tons
- Estimated cost$0
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Or download it now (PDF)How to calculate how much asphalt you need
Asphalt is paved by area but bought by weight, so every take-off runs the same three steps: area, thickness, and a conversion from volume to tons. Get the thickness unit wrong — inches vs feet — and the order is off by a factor of twelve, so that is the one to slow down on.
1. Find the paved area
For a rectangular driveway or lot, area is length × width in feet. For a round area it is π × radius². The calculator applies the right formula when you pick the shape.
2. Set the thickness in inches
Residential driveways are usually 2–3 inches of compacted hot-mix; parking lots and truck-traffic areas go thicker, often 3–4 inches or more. Enter inches and the calculator divides by twelve to get feet before multiplying by the area.
3. Convert volume to tons
Multiply area by thickness for cubic feet, multiply by the mix density — about 145 lb/ft³ for hot-mix asphalt — then divide by 2,000 to get tons. Tonnage is what the plant sells by, so it is the number that drives your material cost.
4. Add a little for compaction and edges
Loose asphalt compacts as it is rolled, and edges and hand-work are never perfectly even, so ordering a small margin over the bare calculation avoids coming up short at the end of a pour. Confirm the mix density with your plant for the tightest estimate.
Sizing the load is step one. Turning it into a priced, professional quote is faster inside CrewRivet. See the gravel calculator, the concrete calculator, or the job pricing calculator.
Asphalt calculator FAQ
- How much asphalt do I need?
- Multiply the paved area (length × width in feet) by the thickness in feet to get cubic feet, multiply by the density of hot-mix asphalt (about 145 lb/ft³), then divide by 2,000 to get tons — the unit the plant sells by. A 600 sq ft driveway at 3 inches works out to roughly 10.9 tons. This calculator runs all of it once you enter the area, thickness, and price per ton.
- How thick should an asphalt driveway be?
- A residential asphalt driveway is typically laid 2–3 inches of compacted hot-mix over a well-prepared aggregate base. Parking lots and areas that carry trucks go thicker — often 3–4 inches or more, sometimes in two lifts. Thickness drives tonnage directly, so set it to your spec; the default here is 3 inches.
- How many tons of asphalt are in a cubic yard?
- At about 145 lb/ft³, a cubic yard of compacted hot-mix asphalt weighs roughly 1.95 tons (27 ft³ × 145 lb ÷ 2,000). Plants sell by the ton, so tonnage is the number that matters for ordering and pricing. The calculator uses your density value, so you can match the exact mix your supplier quotes.
- What density should I use for asphalt?
- Compacted hot-mix asphalt runs about 145 lb/ft³ (roughly 112–150 depending on the mix and compaction). The default here is 145, a standard planning figure. Treat it as an editable placeholder — ask your plant for the density of the specific mix and enter that for the most accurate tonnage.
- Is this asphalt calculator free?
- Yes — the live estimate is free with no email required. Enter your email only if you want the free Job Pricing Kit (pricing worksheet, markup cheat-sheet, and invoice + quote templates) sent to your inbox.