Asphalt Driveway and Parking Lot Calculator
Estimate the asphalt and gravel needed for an asphalt driveway or parking lot installation and get a price estimate by marking the location on a map or using length and width.
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Estimating Asphalt Driveway and Parking Lot Materials
Asphalt is a cost-effective and attractive option for a driveway or parking lot compared to alternatives, such as concrete, and requires little maintenance. Its dark color gives it an attractive appearance and hides imperfections.
When preparing for a new driveway, it’s essential to estimate the asphalt and other materials needed and be armed with a realistic labor cost to ensure you get a fair price.
How Much Asphalt do you Need?
Hot mix asphalt is most often sold by the ton, and coverage varies based on the mix of aggregate and binder. Most asphalt mixes used for driveways and parking lots will weigh 145 pounds per cubic foot of coverage.
Using this formula, it is possible to find out how much asphalt you’ll need for a project.
To find the cubic footage of the project, multiply the length by the width by the depth in feet, or just use a cubic footage calculator.
For example, a 10′ wide x 20′ long driveway with a depth of 3″ would be 50 cubic feet.
10′ × 20′ × 0.25′ = 50 ft3
To find the amount of asphalt needed, multiply the cubic footage by 145 to find the total weight needed, then divide by 2,000.
50 ft3 × 145 = 7,250 lbs
7,250 lbs ÷ 2,000 = 3.625 tons
How Thick Should Asphalt be Installed?
You can install asphalt in different thicknesses, but 2″ is the minimum thickness you should install. Residential driveways should be 3″ thick with a 2″ thick base layer of asphalt and a 1″ thick top wearing surface.
Parking lots expecting light-duty usage should be 4-5″ thick, while parking lots designed for heavy-duty or truck use should be 7-8″ thick.
How Thick of a Base is Needed?
Most professionals suggest installing asphalt over a base of compacted crushed rock. Residential driveways installed over a sandy surface should have a 4″ compacted crushed gravel base, and driveways installed over clay should have an 8″ compacted crushed gravel base. Parking lots should also have an 8″ crushed gravel base.
How Much Does it Cost to Install an Asphalt Driveway?
Asphalt driveways typically cost $4,000 – $8,000 to install, depending on the size, local labor rates, and amount of prep work needed. If you need to remove an existing driveway the costs could increase. Labor rates vary in different regions and the overall cost will vary significantly with the cost of labor.