Estimix

Asphalt Calculator — How Many Tons Do You Need?

Whether you're repaving a residential driveway, extending a parking lot, or laying a new road base, getting the asphalt tonnage right before you call a paving contractor saves you from overpaying on materials — or worse, stopping a job halfway through because you're short. This asphalt calculator takes your area and compacted depth and converts it directly into tons of hot-mix asphalt (HMA). You also get cubic yards and a cost estimate based on current USA asphalt prices. It takes about 10 seconds. No engineering degree required. Built for contractors doing quick takeoffs, DIY homeowners planning a driveway, and anyone who just needs a real number fast.

Calculator inputs

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Units

Results (live)

Cubic feet of mix
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Cubic yards of mix
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Estimated short tons (HMA)
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Estimated material cost
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Enter length, width, and depth greater than zero, and a valid density, to see volume and tonnage.

Formula and units

Paved area in square feet is length × width (with both lengths in the same foot units). Compacted mat thickness in feet is (depth in inches) ÷ 12. Multiplying area by thickness gives volume in cubic feet. Divide by 27 for cubic yards. Tonnage in US short tons is (cubic feet × compacted pounds per cubic foot) ÷ 2,000. If you add a material price per ton, estimated cost is tons × that rate.

Example calculation

A 40 ft by 12 ft drive at 2 in compacted depth and 140 lb/ft³ is 40 × 12 × (2/12) = 80 ft³ (about 2.96 yd³) and 80 × 140 ÷ 2,000 = 5.6 short tons. At $85 per ton for mix, that is roughly $475 before haul and labor.

Cost explanation

The per-ton number you type should match how you are quoted: some yards quote material only, while others include a short haul. Nothing here adds taxes, fuel surcharges, night paving, or minimum-load fees, so use the output as a planning band and tighten it against your sub’s proposal.

Common mistakes

  • Mistaking loose depth for compacted

    Depth on the screed and depth after the roller are not the same. This tool assumes the depth you enter is the compacted lift. If you size off loose raking, you will over-order.

  • Using a generic density on every mix

    RAP content, NMAS, and target air voids change the pounds per yard you actually place. The difference between 135 and 145 lb/ft³ is easily a full half-ton on a long drive.

  • Forgetting to square up the outline

    Irregular or flared aprons, radius returns, and tie-ins to existing pavement add a few percent of area. For bid-grade work, add a takeoff or field tape before locking in tonnage for POs.

Frequently asked questions

  • Why does my batch ticket not match the tons here?

    The plant weighs moisture, binder content, and voids in every load. Rounded ticket weights are also affected by tare, spillage, and the exact density the roller pack achieves in the field. Treat this as a pre-order takeoff, not a certified pay quantity.

  • Is my driveway a single mat depth everywhere?

    Tapers at the street, steeper turnouts, and tie-ins to existing asphalt often change the depth or area. This page models one clear rectangle. Add a second pass for odd wings if they matter to your check.

  • What unit is “short ton” on this page?

    A US short ton is 2,000 lb. The mix quote from most North American plants is in the same short-ton basis—verify if your state job uses metric tonnes instead.