Asphalt Calculator

Calculate how many tons of hot-mix asphalt you need for a driveway, parking pad or overlay. Enter the area and thickness to get tons, cubic yards and cost.

By CalcBuilt Editorial TeamUpdated September 9, 2026Formulas checked against manufacturer specs, see how we calculate.

Quick answer: To find how much asphalt you need, multiply length by width by thickness in feet for cubic feet, then multiply by 145 lb and divide by 2,000 for tons. A 40 x 12 ft driveway paved 3 in thick needs 4.67 cubic yards, or about 9.14 tons of hot-mix asphalt including 5% waste.

Results

Hot-mix asphalt needed: 9.14 tons; 8.7 tons before 5% waste
Volume: 4.67 cu yd; Compacted, at about 145 lb per cubic foot
Area paved: 480 sq ft; At 3 in compacted thickness

Asphalt formula

Cubic feet = Length (ft) x Width (ft) x Thickness (in) / 12
Order volume = Cubic feet x (1 + waste %)
Tons = Order volume x 145 lb / 2,000  (about 1.96 tons per cubic yard)
Cost = Tons x price per ton

Worked example

A new 60 x 20 ft driveway paved 4 in thick with 5% waste: 60 x 20 x (4 / 12) = 400 cubic feet. 400 x 1.05 = 420 cubic feet, or 15.56 cubic yards. 420 x 145 = 60,900 lb, which is 30.45 tons. At $100 per ton the asphalt costs about $3,045 before base material and paving labor.

A 2 in overlay on a 30 x 10 ft parking pad: 30 x 10 x (2 / 12) = 50 cubic feet, or 52.5 with waste. 52.5 x 145 / 2,000 = 3.8 tons.

Quick reference

Asphalt needed per 100 sq ft by compacted thickness (no waste)
Thickness	Cubic feet	Cubic yards	Tons
1.5 in	12.5	0.46	0.91
2 in	16.7	0.62	1.21
3 in	25.0	0.93	1.81
4 in	33.3	1.23	2.42
6 in	50.0	1.85	3.63

How to calculate asphalt

Asphalt plants sell hot-mix by the ton, so the goal is to convert your paved area into weight. Multiply length by width by compacted thickness in feet for cubic feet, then multiply by 145 lb per cubic foot and divide by 2,000. A 40 by 12 foot driveway at 3 inches is 120 cubic feet, or about 8.7 tons before waste.

Use the finished, compacted thickness; the crew lays about 4 inches loose to get 3 inches after rolling. Waste comes from the base, not the math: a proof-rolled base takes 5 percent, a rutted base or hand-raked edges 10 percent. Plants sell by the ton and haul by the truck; a tandem dump carries about 15 tons and a tri-axle 20 to 22, so the driveway above is one truck.

Driveway thickness and base

A new residential driveway needs 3 to 4 inches of compacted asphalt over 6 to 8 inches of compacted crusher run, with geotextile under the stone on clay. The base does the structural work; asphalt over thin or soft base alligator-cracks within a few years. Proof-roll the base with a loaded truck and dig out any spot that pumps. Driveways that carry RVs or delivery trucks go to 4 inches.

Hot mix leaves the plant at 275 to 300°F and must be rolled before it drops below about 185°F: 30 to 45 minutes in mild weather, less in wind under 50°F. Overlays on sound pavement run 1.5 to 2 inches over a tack coat; alligator cracking means milling and rebuilding the base. Sealcoat after 6 to 12 months, then every 2 to 3 years. Paving contractors carry a minimum of typically $1,500 to $2,500 per mobilization, so a small patch is priced by the job.

What this calculator leaves out

The tonnage is hot mix only. Not included: excavation and spoil hauling, the stone base (about 1.4 tons per cubic yard, see the gravel calculator), geotextile, tack coat, milling and sealcoat. A new apron or curb cut needs a right-of-way permit, and plants add a fuel surcharge or asphalt index adjustment.

Mistakes that cost money

Plants haul by the truck: a tandem dump carries 15 tons and a tri-axle 20 to 22, so 9 tons pays a full haul fee.
Mix stops compacting below about 185°F; a 45 minute haul or a slow crew leaves the last truck loose, and it ravels the first winter.
Paving over 3 in of gravel on clay alligator-cracks in 2 to 3 years; a driveway needs 6 to 8 in of compacted crusher run.
Sealcoating before the new mat cures, 6 to 12 months out, traps the light oils and the sealer peels; wait through one summer.
This tonnage is for compacted thickness; a crew that screeds 3 in loose leaves about 2-1/4 in, and a garbage truck cracks it.
A flat driveway ponds water and standing water strips the binder; slope it 1/4 in per ft away from the garage or crown the center.

Key facts

Compacted hot-mix asphalt weighs about 145 lb per cubic foot, or roughly 2 tons per cubic yard.
One ton of asphalt covers about 83 sq ft at 2 in thick, 55 sq ft at 3 in, or 41 sq ft at 4 in.
A new residential driveway is typically 3 to 4 in of compacted asphalt over 6 to 8 in of compacted aggregate base; an overlay on sound pavement is 1.5 to 2 in.
Asphalt is delivered at about 275 to 300°F and must be compacted before it cools below roughly 185°F.
Loose asphalt compacts by about 20 to 25%, so 4 in of loose mix rolls down to about 3 in.

Frequently asked questions

How many tons of asphalt are in a cubic yard?

About 1.96 tons, based on 145 lb per cubic foot for compacted hot-mix asphalt. Most estimators round to 2 tons per yard.

When should I sealcoat a new asphalt driveway?

After the first summer, 6 to 12 months in, once the surface has gone from black to gray. Sealing sooner traps the light oils and the sealer peels. Recoat every 2 to 3 years; sealer is a wear coat and does not fix cracking from a bad base.

How thick should an asphalt driveway be?

3 inches of compacted asphalt over 6 to 8 inches of compacted crusher run for a car driveway, 4 inches where trucks or an RV park. Overlays on sound pavement are usually 1.5 to 2 inches over a tack coat.

How much does asphalt cost per ton?

Hot-mix asphalt typically costs $90 to $160 per ton at the plant in 2026, plus a fuel surcharge. Installed, a residential driveway typically runs $4 to $8 per square foot including base and labor.

Sources and references

HMA Construction Manual, Chapter 2: Mix Properties (unit weight of compacted HMA) (Iowa Department of Transportation)
HMA Pavement Mix Type Selection Guide, Information Series 128 (National Asphalt Pavement Association and FHWA)
Hot Mix Asphalt Pavement Design Guide, Tenth Edition (Maryland Asphalt Association)

Next steps for this project

The usual order for a landscaping & outdoor project. See all landscaping & outdoor calculators.

Results are estimates based on standard formulas and typical product specifications. Confirm quantities with your supplier and local code before ordering.