Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Calculate asphalt tonnage needed from area and thickness, using hot-mix asphalt's typical density.
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Unlike most paving materials that are ordered by volume, asphalt is bought and priced by weight (tons) -- this calculator converts your area and thickness into a volume, then into tonnage using hot-mix asphalt's typical compacted density.
Enter your paving area, planned thickness in inches, and asphalt density (145 lb per cubic foot is a common average for compacted hot-mix asphalt, though it can vary somewhat by mix design).
Volume (cu ft) = Area × (Thickness ÷ 12)
Weight (lb) = Volume × Density
Tons = Weight ÷ 2000
Once you know your tonnage, the Asphalt Cost Calculator turns that into a material and labor cost estimate using your own supplier's price per ton.
Suppose you are paving 2,000 square feet at 2 inches thick with a density of 145 pounds per cubic foot. Volume is 2,000 times 2 divided by 12, about 333.3 cubic feet. Weight is 333.3 times 145, roughly 48,333 pounds, which is about 24.17 tons. If you change the density to 140 for a lighter mix, the total drops to about 23.3 tons, so the density input has a real effect on the order.
Asphalt is placed loose and rolled down, so the thickness you enter should be the finished, compacted thickness. Pavers place slightly more material than the final depth to allow for compaction. Contractors handle that allowance, but if you order material yourself, ask the supplier whether their tonnage recommendation already includes it. Many paving jobs are done in layers, such as a base course and a surface course, and each layer has its own thickness, so calculate them separately and add the tonnage.
When resurfacing over existing pavement, the required thickness may be small, and irregularities in the old surface can consume extra material to level. Consider adding an allowance for filling dips. The result is only a volume-and-weight conversion, so decisions about the right thickness, base, and drainage belong with a paving professional or a local standard.
The tonnage is the material weight only. Delivery, minimum load sizes, and trucking charges are priced separately. Some suppliers have a minimum order that could exceed a very small job.
Hot-mix asphalt needs to be placed while it is still hot and generally in suitable temperatures, so coordinate delivery with your crew so the calculated quantity arrives when the base is ready. If the estimate is far off, you may have to stop mid-job. That is another reason to verify measurements twice and to talk with your supplier about how much to order.
It's a long-standing paving industry convention tied to how asphalt is produced, transported, and compacted -- density can vary slightly by mix design, but weight-based ordering is standard practice.
Residential driveways commonly use 2-3 inches of asphalt over a compacted gravel base, while roads and parking lots supporting heavier loads typically use more -- check local guidance for your specific application.
It depends on the truck. Ask your supplier for the capacity, since it varies between vehicles and regions.
Patches can be estimated the same way with the patch area and depth, but sealcoat is a coating sold by the gallon and is not covered here.
It is a common average for compacted hot-mix. Your supplier's mix design may be different, so enter their figure if you have it.