Asphalt Calculator
Work out how many tons of hot-mix asphalt your driveway needs — plus the volume in cubic yards and the estimated material cost.
Reviewed by the CalcCafe editorial team · Last updated 1 July 2026 · How we test our tools
Example
A 40 ft × 12 ft driveway paved 2 in thick is 40 × 12 × (2 ÷ 12) = 80 ft³. At 145 lb/ft³ that weighs 80 × 145 ÷ 2000 = 5.8 tons, or about 2.96 cubic yards. At $120 per ton the material runs roughly $696.
How it works
Volume (ft³) = length × width × (thickness ÷ 12). Tons = volume × density ÷ 2000 (2,000 lb per US ton). Cubic yards = volume ÷ 27. Estimated cost = tons × price per ton.
Good to know
Paving is priced by weight, not area, so the number that actually matters when you call a supplier is tonnage. This tool takes the driveway footprint — length and width in feet — plus the compacted thickness in inches and turns it into the tons of hot-mix asphalt you need to order, the volume in cubic yards for cross-checking, and a rough material cost. It suits homeowners resurfacing a drive, contractors sizing a small lot, or anyone comparing a bid against back-of-envelope math.
Thickness is the input people underestimate. A residential driveway is commonly laid around 2 to 3 inches of compacted asphalt over a compacted gravel base; heavier traffic or poor subgrade calls for more. Because tonnage scales directly with thickness, adding an inch is not a rounding error — it moves the order and the price meaningfully, so use the compacted depth your paver specifies rather than a loose guess.
Density varies with the mix. Typical hot-mix asphalt runs about 140 to 150 lb per cubic foot, and the 145 default sits in the middle. If your supplier quotes a specific mix density, plug it in for a tighter estimate. Keep in mind that quoted material weight assumes full compaction; loose, uncompacted asphalt takes up more volume for the same tonnage.
Treat the cost figure as material only. It does not include delivery, tack coat, base preparation, grading, labor, equipment mobilization, or minimum-load charges, all of which can rival or exceed the asphalt itself on a small job. Add a small waste allowance for edges and irregular shapes, and always get an itemized quote before committing.
Frequently asked questions
How many tons of asphalt do I need for a driveway?
Multiply length × width × (thickness in inches ÷ 12) to get cubic feet, times density (about 145 lb/ft³), divided by 2,000. A 40×12 ft drive at 2 in works out to roughly 5.8 tons.
How thick should an asphalt driveway be?
Residential driveways are commonly paved 2 to 3 inches of compacted asphalt over a solid gravel base. Heavier vehicles or weak subgrade call for more depth — check your paver's recommendation and local practice.
Is my data uploaded anywhere?
No — this calculator runs entirely in your browser. Your inputs never leave your device, and it works offline once loaded.
Is this calculator free?
Yes, completely free with no sign-up and no limits.
People also ask
How much does a ton of asphalt cover?
At 145 lb/ft³ and a 2-inch depth, one ton covers about 82 square feet. Coverage drops as thickness rises, so thicker paving means fewer square feet per ton.
How do you calculate asphalt tonnage?
Find the volume in cubic feet (length × width × thickness ÷ 12), multiply by the mix density in pounds per cubic foot, then divide by 2,000 to convert pounds to US tons.
What is the density of asphalt?
Compacted hot-mix asphalt typically weighs 140 to 150 pounds per cubic foot, or roughly 2 tons per cubic yard. The exact figure depends on the aggregate and mix design.
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Sources & references
These tools follow our methodology and provide educational estimates only — verify important figures with a qualified professional.