Enter the length of the road, the number of lanes and the shoulders, pick new construction, mill-and-overlay or a plain overlay, and the calculator returns the tons of hot mix for each layer, the base stone, truckloads and a cost built from your own prices. Switch to metric for kilometers, meters, centimeters and tonnes; the cost then comes out in whatever currency you typed in.
Quick answer: one lane-mile of road (12 ft × 5,280 ft) paved 2 inches thick takes about 774 tons of hot mix at the common estimating rate of 110 lb per square yard per inch, so a two-lane road takes about 1,550 tons per mile.
In metric, 1 km of a 7 m wide road at 5 cm takes 1,000 × 7 × 0.05 × 2.322 = 813 tonnes at 2,322 kg/m³. Multiply the tonnage by your local price per tonne for the asphalt cost; a 2 in (5 cm) mill-and-overlay of a two-lane mile comes to about $251,000 with this page's default US prices.
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How Much Does It Cost to Pave a Mile of Road?
There is no single figure. A resurfacing job on a quiet rural road and a new urban highway differ by a factor of 10 or more. The best national benchmark is the set of typical costs the Federal Highway Administration uses in its investment model, published in the 24th Conditions and Performance report. They are in 2016 dollars per lane-mile, so double them for a two-lane road:
| Work | Rural roads | Urban roads |
|---|---|---|
| Resurface existing lane | $190 to $500 | $337 to $833 |
| Reconstruct existing lane | $688 to $1,740 | $1,041 to $2,789 |
| New road, new alignment (normal cost) | $3,372 to $11,114 | $4,279 to $13,213 |
Low end: local roads on flat ground or in small towns. High end: Interstates in mountains or major cities. High-cost new alignments, through dense development or difficult terrain, reach about $47 million per lane-mile in FHWA's table.
Those 2016 figures are now low. FHWA's National Highway Construction Cost Index rose 7.4% in the year to the third quarter of 2024 alone, far faster than general inflation. Local budgets show the same picture: the Village of Germantown, Wisconsin, plans its 2026 street work at $89 per linear foot for a 2 in mill-and-overlay and $109 per foot for reconstruction, about $470,000 and $576,000 per mile, including curb, storm and base repairs.
This calculator prices only the paving items, so its result sits below these all-in agency figures. Use it to check the asphalt part of a bid or to see how width and thickness move the total.
What Drives the Cost of a Road
- Width. Cost scales directly with paved width. Going from 2 × 10 ft lanes to 2 × 12 ft adds 20% asphalt; paving 4 ft shoulders on a 24 ft road adds another third.
- Thickness. Each inch on a 24 ft road is about 766 tons per mile at 145 lb/ft³. A full-depth new road with 6.5 in of asphalt uses more than three times the mix of a 2 in overlay.
- Price per ton. In-place hot mix prices vary with oil prices, haul distance and job size. Oregon DOT's 2025 low bids for ½-inch mix on jobs over 1,000 tons ran from $77.50 to $160 per ton.
- Base and earthwork. A new road needs a compacted aggregate base, and usually excavation, drainage and land, which this tool does not price. Size the stone with the gravel base calculator and the dig with the excavation calculator.
- Traffic and project overheads. Indiana DOT's design manual sets mobilization at 5% of the contract and puts traffic maintenance at 5% to 15% for major projects. Night work, detours and flaggers on a busy road push that up.
New Road vs. Resurfacing
New construction builds the whole pavement: an aggregate base, then one or more asphalt layers (base, binder and surface courses). The calculator's default new-road section, 3 in asphalt base + 2 in binder + 1.5 in surface on 8 in of stone (8 + 5 + 4 cm on 20 cm in metric), is only an example; an engineer sets the real one from soil and truck traffic.
Mill and overlay grinds off the worn top 1.5 to 3 in and replaces it, keeping curb and drainage levels. The milling itself is cheap on large jobs: Oregon's 2025 low bids for 2 to 3 in cold planing over 10,000 sq yd averaged about $2.24 per sq yd. The page default is $2.50.
Overlay only paves over the existing surface. It is cheapest but raises the road, and it will crack again if the old surface has failed. Every overlay needs a tack coat; the tack coat calculator gives the gallons.
Tons of Asphalt per Mile and per Kilometer
US tons per mile of road at 145 lb/ft³ (the calculator default). At 110 lb/SY-in the figures are about 1% higher.
| Paved width | 1.5 in | 2 in | 3 in |
|---|---|---|---|
| 12 ft (one lane) | 574 | 766 | 1,148 |
| 20 ft | 957 | 1,276 | 1,914 |
| 24 ft (two 12 ft lanes) | 1,148 | 1,531 | 2,297 |
| 32 ft (24 ft + 4 ft shoulders) | 1,531 | 2,042 | 3,062 |
Metric tonnes per kilometer at 2,322 kg/m³:
| Paved width | 4 cm | 5 cm | 10 cm |
|---|---|---|---|
| 3.5 m (one lane) | 325 | 406 | 813 |
| 5 m | 464 | 581 | 1,161 |
| 6 m | 557 | 697 | 1,393 |
| 7 m (two 3.5 m lanes) | 650 | 813 | 1,625 |
For a shorter stretch, scale by length: 200 m is 0.2 of the per-km figure. The asphalt tonnage calculator handles any area and spread rate.
How the Calculator Works
- Paved width = lanes × lane width, plus both shoulders if they are paved.
- Tons per layer = length × width × thickness × density. In US units: sq ft × in ÷ 12 × 145 lb ÷ 2,000. In metric: m² × cm ÷ 100 × 2,322 kg ÷ 1,000.
- Base stone (new roads) covers the lanes and both shoulders, at 1.875 tons per compacted cubic yard (2.225 t/m³).
- Cost = tons × hot mix price + base tons × base price + milled area × milling price. Mobilization, traffic control and striping are added as percentages of that, then the contingency.
- Per length: the total is divided by miles (or km) and by lane-miles (or lane-km).
The default percentages are 5% mobilization and 5% traffic control (the Indiana DOT figures above), 2% for striping (our own assumption for a two-lane road; enter a quote if you have one) and 10% contingency, the bottom of Indiana's 10% to 25% range for early estimates. The full method is on our methodology page.
Worked Examples
Example 1: New 1 km road, metric
Two 3.5 m lanes with 1 m gravel shoulders: paved area 1,000 × 7 = 7,000 m². Asphalt 4 + 5 + 8 = 17 cm: 7,000 × 0.17 × 2.322 = 2,763 tonnes (2,763 t per km, 1,382 per lane-km, 154 trucks of 18 t). Base: 1,000 × 9 m × 0.20 m × 2.225 = 4,005 tonnes. At the calculator's converted defaults of 121 per tonne of mix and 61 per tonne of stone, the paving items come to 578,626; with 12% for mobilization, traffic and striping and 10% contingency, 712,868 per km in your currency, or 101.84 per m². That covers the pavement only, not earthworks or drainage.
Example 2: 200 m village road, 5 m wide
An overlay of 5 cm on 200 × 5 = 1,000 m²: 1,000 × 0.05 × 2.322 = 116.1 tonnes, about 7 truckloads. That is 580.5 t per km. At 121 per tonne, the mix costs 14,048, and with the default percentages the job comes to about 17,307, or 17.31 per m². Enter your local asphalt price to get the figure in your currency; in Europe the price is usually quoted per tonne or per m² laid.
Example 3: 1-mile, two-lane overlay, US
Two 12 ft lanes, gravel shoulders, 2 in overlay: 5,280 × 24 = 126,720 sq ft (14,080 sq yd). Hot mix: 126,720 × 2 ÷ 12 × 145 ÷ 2,000 = 1,531.2 tons, or 765.6 tons per lane-mile and 77 trucks. At $110 per ton the mix is $168,432; with 12% for mobilization, traffic control and striping plus 10% contingency the total is $207,508, about $103,754 per lane-mile or $14.74 per sq yd. Milling 2 in first adds 14,080 sq yd × $2.50 = $35,200 before percentages, for $250,875 in all.
Related Calculators
Frequently Asked Questions
How much does it cost to pave a road per mile?
FHWA's typical costs, in 2016 dollars, are about $190,000 to $833,000 per lane-mile to resurface and $3.4 to $13.2 million per lane-mile to build a new road on a new alignment. Costs have risen since. A two-lane resurfacing at this page's default prices comes to about $208,000 to $251,000 per mile for paving alone.
How many tons of asphalt are in a mile of road?
A 12 ft lane needs about 774 tons per mile for each 2 inches at 110 lb per square yard per inch, or 766 tons at 145 lb/ft³. A two-lane, 24 ft road at 2 inches needs about 1,531 to 1,549 tons per mile.
How much asphalt is needed for 1 km of road?
A 7 m wide road paved 5 cm thick needs 1,000 × 7 × 0.05 × 2.322 = about 813 tonnes per kilometer. At 4 cm it needs 650 tonnes, and a 3.5 m single lane at 5 cm needs 406 tonnes.
How much does it cost to pave 1 km of road?
Multiply the tonnes by your local price per tonne laid, then add milling, base and site costs. For a 7 m road at 5 cm, that is 813 tonnes times your price; with the default extras of 12% and a 10% contingency the total is about 1.23 times the material cost.
How much asphalt for 200 meters of road?
At 5 m wide and 5 cm thick, 200 m of road is 1,000 m² and needs about 116 tonnes, or 7 trucks of 18 tonnes. At 4 cm it needs about 93 tonnes.
What is a lane-mile?
One mile of one traffic lane. A two-lane road one mile long is two lane-miles, and a four-lane highway is four. Agencies use it because cost and tonnage scale with the number of lanes.
Is it cheaper to resurface or rebuild a road?
Resurfacing is much cheaper: FHWA's typical resurfacing costs are roughly a quarter to a third of reconstruction for the same lane. It only works when the base is sound; widespread cracking, rutting or soft spots mean the road needs rebuilding.
Sources
- Federal Highway Administration, Status of the Nation's Highways, Bridges, and Transit, 24th Edition, Appendix A (Exhibits A-5 to A-8: typical costs per lane-mile by improvement type, thousands of 2016 dollars).
- Federal Highway Administration, National Highway Construction Cost Index, 2024 Q3 narrative (7.4% year-over-year increase).
- Oregon Department of Transportation, Average bid item prices, 2025 bid data. Our analysis of the low bids: Level 2 to 4, ½-inch ACP on items over 1,000 tons averaged $112.47 per ton (8 contracts, $77.50 to $160); 2 to 3 in cold plane removal over 10,000 sq yd averaged $2.24 per sq yd; aggregate base over 1,000 tons had a median of $57 per ton.
- Indiana Department of Transportation, Design Manual, Chapter 20: Cost Estimating (mobilization 5%, traffic maintenance 5% to 15%, contingency 10% to 25%).
- Village of Germantown, WI, 10-Year Road Program (2026 modifiers: $89 per linear foot for mill and overlay, $109 for reconstruction).
- Pennsylvania Asphalt Pavement Association, Constructing Quality Asphalt Pavements in PA, Check List (2025) (110 lb/SY-in worked examples; typical compacted mix 108 to 120 lb/SY-in or 144 to 160 lb/ft³; 581 tons for a 12 ft lane-mile at 1.5 in).
- Federal Highway Administration, Lane Width: Flexibility in the AASHTO Guidelines (12 ft / 3.6 m lanes; as narrow as 9 ft on low-volume rural roads).
Last updated: October 2026 · How we calculate