Asphalt Calculator
Need to know how much asphalt to order? Enter your length, width, and thickness above, then press Calculate. It returns the tonnage, the volume in cubic yards, and a cost breakdown.
Most paving jobs get priced by the ton, so tonnage is the number that decides your bill. This tool converts your area and thickness into tons using real mix densities, adds an optional waste margin, and even splits surface, base, and sub-base layers separately. Below the calculator you will find the exact formula, a coverage table showing how many square feet one ton covers, and 2026 cost ranges for driveways.
How Much Asphalt Do I Need?
To find how much asphalt you need, multiply your area by the thickness to get volume, then multiply volume by the asphalt density and divide by 2000 to convert pounds into tons. A standard hot mix weighs about 145 pounds per cubic foot.
The calculator above does this for you. It also handles metric units, custom densities, and multiple layers, so you can plan a full driveway build or a simple resurface with the same tool.
Asphalt Tonnage Formula
Here is the exact formula the calculator uses:
Tons of asphalt = (Area × Thickness in feet × Density) ÷ 2000
Where Area is in square feet, Thickness is converted to feet (inches ÷ 12), and Density is in pounds per cubic foot (145 for standard hot mix). Dividing by 2000 converts pounds to US tons.
Worked example. A driveway that is 20 feet by 30 feet is 600 square feet. Paved 3 inches thick at 145 lb/ft³:
- Thickness in feet: 3 ÷ 12 = 0.25 ft
- Volume: 600 × 0.25 = 150 cubic feet
- Weight: 150 × 145 = 21,750 pounds
- Tons: 21,750 ÷ 2000 = 10.88 tons
Add a waste margin of 5 to 10 percent for compaction and trimming, which brings a real order closer to 11.4 to 12 tons.
How Many Square Feet Does a Ton of Asphalt Cover?
One ton of standard hot mix asphalt covers about 83 square feet at 2 inches thick. Coverage drops as thickness rises, because a thicker layer uses more material per square foot. Use this table to estimate coverage before you run the calculator.
| Thickness | Coverage per Ton (145 lb/ft³) |
|---|---|
| 1 inch | 166 sq ft |
| 1.5 inch | 110 sq ft |
| 2 inch | 83 sq ft |
| 2.5 inch | 66 sq ft |
| 3 inch | 55 sq ft |
| 4 inch | 41 sq ft |
These figures assume a density of 145 lb/ft³. Denser mixes cover slightly less area per ton.
Asphalt Density and Weight
Density is what turns your volume into a weight, so picking the right mix matters. Standard hot mix asphalt weighs about 145 pounds per cubic foot, which works out to roughly 3,915 pounds, or just under 2 tons, per cubic yard.
| Asphalt Mix Type | Density (lb/ft³) | Weight per Cubic Yard |
|---|---|---|
| Dense mix | 140 | 1.89 tons |
| Standard hot mix | 145 | 1.96 tons |
| Heavy mix | 150 | 2.03 tons |
The calculator lets you pick a preset or enter a custom density if your supplier quotes a different figure.
How to Convert Square Feet and Yards to Tons
Suppliers often quote in tons while your site is measured in square feet or square yards. The calculator converts automatically, but here are the direct relationships at 2 inches thick and 145 lb/ft³.
| Measurement | Equals (at 2 inch, 145 lb/ft³) |
|---|---|
| 1 square yard | 0.11 tons |
| 10 square yards | 1.09 tons |
| 100 square yards | 10.88 tons |
| 1 cubic yard | 1.96 tons |
| 1,000 square feet | 12.08 tons |
To go from cubic yards to tons at any thickness, multiply cubic yards by 1.96. For square yards, multiply the square footage (square yards × 9) by your thickness in feet, then by 145, then divide by 2000.
How to Use the Asphalt Calculator
- Enter the length and width of the area in feet or meters.
- Set the thickness of the surface layer in inches or centimeters.
- Pick your asphalt density or enter a custom value.
- Optional: add a base or sub-base layer, a waste percentage, and cost inputs.
- Press Calculate.
It returns total tonnage, area, volume in cubic feet and cubic yards, a layer-by-layer material breakdown, and a cost summary.
Asphalt Thickness by Project Type
Thickness drives both your material cost and how long the surface lasts. Heavier traffic needs a deeper layer.
| Project Type | Recommended Thickness |
|---|---|
| Driveway resurfacing | 1 to 2 inches |
| New residential driveway | 2 to 4 inches |
| Parking lot | 4 to 6 inches |
| Road pavement | 6 to 12 inches |
Asphalt Driveway Cost
Asphalt driveways run about $4 to $8 per square foot installed, which covers material, labor, and equipment. Your final price depends on driveway size, thickness, local asphalt rates, and site prep. Below are typical 2026 ranges for a new install.
| Driveway Size | Estimated Cost (New Install) |
|---|---|
| Small (12 × 20 ft) | $1,200 to $2,200 |
| Medium (20 × 30 ft) | $2,500 to $5,500 |
| Large (24 × 50 ft) | $5,000 to $10,000 |
Enter your own cost per ton or cost per square foot in the calculator to get a figure matched to your local pricing. To pad an estimate for overage, apply a percentage markup on top of the base total.
Asphalt Driveway Resurfacing Cost
Resurfacing costs 40 to 70 percent less than a full replacement because it reuses the existing base. A crew cleans the surface, fills cracks, and lays a fresh 1 to 2 inch layer on top.
| Driveway Size | Estimated Resurfacing Cost |
|---|---|
| Small (12 × 20 ft) | $600 to $1,500 |
| Medium (20 × 30 ft) | $1,300 to $3,000 |
| Large (24 × 50 ft) | $3,000 to $6,500 |
Asphalt vs Concrete Driveway Cost
Asphalt is cheaper to install and faster to lay, while concrete lasts longer and needs less upkeep. Asphalt costs about $4 to $8 per square foot; concrete runs $6 to $12.
| Material | Cost per Sq Ft | Best For |
|---|---|---|
| Asphalt | $4 to $8 | Cold climates, tight budgets, quick installs |
| Concrete | $6 to $12 | Hot climates, long lifespan, low maintenance |
Asphalt flexes in freeze-thaw cycles and is easy to patch or resurface. Concrete handles heat better and can last decades, but repairs are harder and pricier.
Blacktop, Tarmac, and Hot Mix: Are They the Same?
Mostly yes. Blacktop, tarmac, and hot mix asphalt all describe the same basic material, a blend of aggregate bound with bitumen. The names vary by region and by the exact mix, but the calculation is identical. Whether your supplier calls it blacktop or hot mix, use the same 145 lb/ft³ density and the formula above.
Crushed and Cold Patch Asphalt
Crushed or recycled asphalt is lighter and looser than hot mix, so it usually weighs closer to 120 to 140 lb/ft³ when compacted. For a small pothole repair with cold patch, measure the hole's length, width, and depth, then enter a custom density to match the product label. The same tonnage formula applies.
Why Use This Asphalt Calculator?
- Exact tonnage, cubic yards, and cubic feet
- Real mix densities plus a custom density option
- Separate surface, base, and sub-base layer breakdown
- Built-in waste margin that covers compaction and trimming
- Full cost summary with material, labor, equipment, and tax
- Works in feet or meters, inches or centimeters
Cost ranges verified for 2026. Prices vary by region, supplier, and season. Always confirm current rates with a local paving contractor before ordering.
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Frequently Asked Questions
How much asphalt do I need for a driveway?
Multiply length by width for square feet, then apply area × thickness in feet × 145, divided by 2000. A 600 square foot driveway at 3 inches needs about 10.9 tons before waste.
How many square feet does a ton of asphalt cover?
About 83 square feet at 2 inches, 55 at 3 inches, and 41 at 4 inches.
How much does a cubic yard of asphalt weigh?
A cubic yard of standard hot mix asphalt weighs about 3,915 pounds, or 1.96 tons, at a density of 145 pounds per cubic foot.
What is the formula for asphalt tonnage?
Tons = (area in square feet × thickness in feet × density in lb/ft³) ÷ 2000, with 145 lb/ft³ for standard hot mix.
Is asphalt cheaper than concrete?
Yes. About $4 to $8 per square foot installed against $6 to $12 for concrete.