A 50 x 12 ft driveway paved 3 in thick (measured after rolling) takes about 11 tons of hot-mix asphalt: 66.67 sq yd × 3 in × 110 lb per sq yd per inch = 22,000 lb.
In this guide
To figure asphalt by hand, turn the area into square yards (square feet ÷ 9), multiply by the compacted thickness in inches and by the mix weight, about 110 lb per square yard per inch, then divide by 2,000 for tons. Tennessee's DOT and Pennsylvania's asphalt pavement association figure tonnage the same way.
Our asphalt calculator also gives the compacted cubic yards and, if you enter a base depth, the crushed stone for the gravel base. It doesn't design the pavement: the thickness and the base come from your paving contractor and your local code.
How to measure for an asphalt driveway
- Measure the area to pave in feet (12 ft 6 in is 12.5 ft). Split the apron, flares, and any parking pad into rectangles; the square footage calculator adds up to three. If you know the total square feet, enter it as the length and 1 as the width.
- Enter the compacted thickness from your contractor's proposal. That's the thickness after rolling, not the loose layer the paver lays down.
- Enter the mix weight. 110 lb per sq yd per inch is within the typical range; your supplier's mix may differ (see below).
- Add the gravel base depth if new stone goes under the asphalt, or 0 if you're paving over an existing base or building full-depth asphalt.
- Leave Extra at 0 unless your contractor wants a margin.
The asphalt formula
- Area (sq yd) = length (ft) × width (ft) ÷ 9
- Asphalt (lb) = sq yd × compacted thickness (in) × mix weight (lb per sq yd per inch)
- Tons = lb ÷ 2,000, plus any extra percentage
- Cubic yards = length × width × thickness (in) ÷ 12 ÷ 27 (the cubic yard calculator does the same for circles and triangles)
- Gravel base = length × width × base depth (in) ÷ 12 ÷ 27 cubic yards, × 1.4 for tons
The tons line is the one in a 2016 Tennessee DOT design bulletin: "Area (S.Y.) × Lb per SY per inch thickness / 2,000 Lb./ Ton = Tons". A square yard 1 inch thick is 0.75 cu ft, so 110 lb per sq yd per inch is 146.67 lb per cu ft (the Pennsylvania Asphalt Pavement Association's checklist rounds it: "110 lb/sy/in or 147 lbs/cf"), or 1.98 tons per cubic yard.
Worked example (the calculator's default values)
A 50 x 12 ft driveway (an example size), paved 3 in thick after rolling with mix at 110 lb per sq yd per inch, on a 6 in gravel base, one of the builds in the thickness table below:
- Area: 50 × 12 = 600 sq ft, ÷ 9 = 66.67 sq yd.
- Weight: 66.67 × 3 × 110 = 22,000 lb, ÷ 2,000 = 11 tons.
- Volume: 600 × 3 ÷ 12 = 150 cu ft, ÷ 27 = 5.56 cu yd.
- Base: 600 × 6 ÷ 12 = 300 cu ft, ÷ 27 = 11.11 cu yd, × 1.4 = 15.56 tons.
The calculator shows: "You need about 11 tons of asphalt (5.56 cu yd compacted)." and "Area: 600 sq ft (66.67 sq yd). At 3 in compacted and 110 lb per sq yd per inch (146.67 lb per cu ft): 66.67 x 3 x 110 = 22,000 lb, or 11 tons. Gravel base: 11.11 cu yd (about 15.56 tons) of crushed stone at 6 in deep."
Other builds on the same driveway
- Full-depth asphalt, 4 in, no gravel base: about 14.67 tons (7.41 cu yd). At 6 in it's 22 tons.
- Two courses, 2 in + 1.5 in = 3.5 in: about 12.83 tons, with the same 11.11 cu yd of base at 6 in.
- A 1.5 in overlay of the old driveway: about 5.5 tons, no base.
- The default with 5% extra: about 11.55 tons (5.83 cu yd).
Asphalt tons by driveway size and thickness
Tons of hot mix at 110 lb per sq yd per inch, compacted, with no extra and no base. The sizes are examples.
| Driveway (ft) | 2 in | 3 in | 3.5 in | 4 in | 6 in |
|---|---|---|---|---|---|
| 20 x 10 (200 sq ft) | 2.44 | 3.67 | 4.28 | 4.89 | 7.33 |
| 40 x 10 (400 sq ft) | 4.89 | 7.33 | 8.56 | 9.78 | 14.67 |
| 50 x 12 (600 sq ft) | 7.33 | 11 | 12.83 | 14.67 | 22 |
| 40 x 16 (640 sq ft) | 7.82 | 11.73 | 13.69 | 15.64 | 23.47 |
| 40 x 20 (800 sq ft) | 9.78 | 14.67 | 17.11 | 19.56 | 29.33 |
| 50 x 24 (1,200 sq ft) | 14.67 | 22 | 25.67 | 29.33 | 44 |
Turned around, one ton covers about 81.82 sq ft at 2 in, 54.55 sq ft at 3 in, and 40.91 sq ft at 4 in.
How thick should an asphalt driveway be?
Two state asphalt pavement associations give these driveway builds:
| Build | Asphalt, compacted | Base under it | Source |
|---|---|---|---|
| Full-depth asphalt | 4 in may be adequate; 5 or 6 in is stronger | None: asphalt from the soil subgrade up | Illinois Asphalt Pavement Association |
| Asphalt on aggregate | 3 in | 6 to 8 in of compacted aggregate | Illinois Asphalt Pavement Association |
| Two courses on aggregate | 2 in bottom + 1.5 in surface (3.5 in) | 6 to 8 in of crushed aggregate | Colorado Asphalt Pavement Association |
| Overlay of an old driveway | 1.5 to 2 in | The existing pavement | Both |
The Illinois page says 5 or 6 in "will assure you of a stronger, stable driveway under a wider range of climate and loads," and it quotes a vice president of the National Asphalt Pavement Association: "We recommend full-depth asphalt for driveways," adding that "1 inch of asphalt pavement is equivalent to 3 inches of aggregate base." By that ratio, 3 in of asphalt on 6 in of stone compares with about 5 in of full-depth asphalt.
These are guide figures, not a pavement design. Follow your local code and have a paving contractor set the thickness and base for your soil, drainage, and vehicles. A concrete driveway has its own minimums; the concrete calculator guide lists them.
How much does asphalt weigh?
It depends on the mix. The Pennsylvania Asphalt Pavement Association's checklist says: "A typical compacted asphalt mix will weigh 108 to 120 pounds per square yard per inch thickness (lbs/sy/in) or 144 to 160 pounds per cubic foot (lbs/cf)." Its examples use 110, and it advises checking your project's mix design. Tennessee DOT's bulletin assigns 106 to its Grading D surface mixes, 110 to 115 to most of its base mixes, and 88 to its OGFC surface mix.
| lb per sq yd per inch | lb per cu ft | Tons per cu yd | Example driveway, 3 in |
|---|---|---|---|
| 106 | 141.33 | 1.908 | 10.6 tons |
| 108 | 144 | 1.944 | 10.8 tons |
| 110 | 146.67 | 1.98 | 11 tons |
| 115 | 153.33 | 2.07 | 11.5 tons |
| 120 | 160 | 2.16 | 12 tons |
If your supplier quotes pounds per cubic foot, multiply by 0.75 to get the calculator's unit: 145 lb per cu ft is 108.75 lb per sq yd per inch, or 10.88 tons for the example driveway. Typing 145 straight into the field would give 14.5 tons, about 32% too much.
Compacted thickness vs. laid thickness
Hot mix goes down loose and gets thinner under the rollers. The National Asphalt Pavement Association's paving handbook gives "a common rolldown factor (for a typical dense-graded mix) being approximately 25 percent," with a 2 in compacted lift laid 2.5 in thick. So a 3 in driveway starts near 3.75 in. Rolling packs the same tons into less depth, which is why the calculator pairs the compacted thickness with a compacted weight.
The Illinois association says asphalt is best placed in layers (lifts): "a total of 2 to 3 inches may be spread as two layers each 1-1/2 inches thick when compacted," and that a good way to pave a 4 in mat is to place 2.5 in, compact it, then pave and compact the rest. The total tons don't depend on the number of lifts. Thinner lifts need warmer weather: the same page wants air and surface temperatures above 70°F for a 1.5 in lift and above 40°F for a 2 in lift.
The gravel base under the asphalt
Both associations put 6 to 8 in of aggregate under an asphalt driveway that isn't full-depth, so the base field starts at 6. The Colorado guide adds that the subgrade should be graded smooth and free of organic material, with weak spots dug out and replaced, and the base compacted with rollers.
The calculator weighs the base at 1.4 tons per cubic yard, the same figure as our paver calculator. Select Sand & Gravel puts crushed stone at roughly 1.35 to 1.4 tons per yard, and crusher run or road base at up to 1.5. The base line is the finished, compacted volume. To order loose stone, run the depth through the gravel calculator, whose guide covers the compaction allowance, and use your supplier's weight. For a paver driveway instead, the paver calculator sizes the base, sand, and pavers.
Tips and common mistakes
- Entering the laid thickness. Use the compacted thickness from the proposal, or the tons come out about a quarter too high.
- Measuring only the straight run. The apron and any parking pad count too.
- Ignoring drainage. The Illinois association says to make sure your contractor "plans and builds adequate surface slopes to produce good drainage," and calls standing water on or near the driveway undesirable. The Colorado guide says drainage, crown, and slopes "need to be addressed."
- Overlaying without repairs. For an overlay, the Illinois association says to have the contractor patch serious holes or cracks with asphalt and compact it first, or the trouble spots may reflect up through the new pavement.
- Skipping upkeep. The Colorado guide says a high-grade asphalt liquid sealer applied every two to five years can extend the driveway's service life and improve its appearance.
Frequently asked questions
How many tons of asphalt do I need for a driveway?
Multiply the square yards by the compacted inches and by about 110 lb, then divide by 2,000. A 50 x 12 ft driveway takes about 11 tons at 3 in and 14.67 tons at 4 in.
How much area does a ton of asphalt cover?
At 110 lb per sq yd per inch, one ton covers about 81.82 sq ft at 2 in, 54.55 sq ft at 3 in, and 40.91 sq ft at 4 in.
How much does asphalt weigh per cubic foot?
The Pennsylvania Asphalt Pavement Association puts typical compacted mix at 144 to 160 lb per cu ft (108 to 120 lb per sq yd per inch) and uses 147 lb per cu ft (110 lb per sq yd per inch) in its examples.
How many cubic yards are in a ton of asphalt?
At 110 lb per sq yd per inch, compacted asphalt weighs 1.98 tons per cubic yard, so one ton is about 0.505 cu yd, or 13.64 cu ft.
How thick should an asphalt driveway be?
The Illinois Asphalt Pavement Association says 4 in of full-depth asphalt may be adequate and 5 or 6 in is stronger, or 3 in over 6 to 8 in of compacted aggregate. Follow your local code and your paving contractor.
How thick is asphalt before it's rolled?
The National Asphalt Pavement Association's handbook puts the rolldown of a typical dense-graded mix at about 25 percent: a 2 in compacted lift is laid 2.5 in thick, so 3 in compacted starts near 3.75 in.
Sources
- Pennsylvania Asphalt Pavement Association: Constructing Quality Asphalt Pavements in Pennsylvania Check List, 4th Edition (2025, PDF)
- Tennessee Department of Transportation: Instructional Bulletin No. 16-11, Computations for Hot Mix (2016, PDF)
- National Asphalt Pavement Association: Asphalt Paving Handbook, 7.5 Layer Thickness
- Illinois Asphalt Pavement Association: Driveways
- Colorado Asphalt Pavement Association: "Best Practices" for the Use of Asphalt Driveways (2005, PDF)
- Select Sand & Gravel: How Much Does a Yard of Crushed Stone Weigh?
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