Asphalt Calculator
Tons of hot mix asphalt for driveways, parking lots, patios, and pothole repair. Configurable density for HMA, asphalt millings, or cold patch. Three shape modes: rectangle, circle, custom area. Truckload estimate for delivery planning.
Results
Estimates only. Actual yields vary by mix density, compaction, base condition, and lift thickness. Confirm minimum delivery quantities, mix specifications, and bulk pricing with your supplier before ordering. TakeoffCalc isn't responsible for material over- or under-orders.
How to use this calculator
- 01Pick an Application preset to fill the recommended thickness: Residential driveway (2.5" / 6.4 cm), Commercial driveway (3" / 7.5 cm), Parking lot (3-5" / 7.5-12.5 cm), or Pothole patch (3" / 7.5 cm). Or pick Custom and enter your own.
- 02Pick a Shape. Rectangle for typical driveways, parking pads, and patios. Circle for round patios and turnarounds. Custom Area for irregular shapes (L-driveways, freeform sections) where you've already calculated the total square footage.
- 03Enter your dimensions. Editing the thickness field flips the Application back to Custom, so the form reflects that you're no longer following a preset.
- 04Pick a density. The default 145 lb/cu ft (2,323 kg/m³) is standard hot mix asphalt. Asphalt millings are lighter at about 120 lb/cu ft (1,920 kg/m³). Pick Custom to enter a value from your supplier's spec sheet.
- 05Set Waste / Compaction (5-10% standard, 10% for driveways). Tons Needed (with waste) is the order quantity. Approximate Truckloads gives you a sense of delivery scheduling. A standard tri-axle dump truck holds about 22 tons (20 tonnes).
Understanding the math
Three steps. First, project area from shape. Rectangle is length × width. Circle is π × (diameter/2)². Custom area is entered directly:
area = length × width · or · π × radius² · or · entered directly
Second, multiply by thickness (converted from inches/cm to feet/m) for volume, then add waste/compaction:
volume = area × thickness × (1 + waste%) · cubic_yards = volume / 27
Third, multiply by the asphalt density to get weight, then convert to tons. Standard hot mix asphalt runs 145 lb/cu ft (2,323 kg/m³):
weight_lbs = volume_ft³ × density_lb_per_ft³ · tons = lbs / 2000
Worked example: a 24 ft × 12 ft (7.3 m × 3.7 m) residential driveway at 3-inch (7.5-cm) thickness in standard hot mix asphalt with 10% waste. Area = 288 ft² (26.8 m²). Volume = 288 × (3/12) × 1.10 = 79.2 ft³ (2.24 m³) = 2.93 yd³. Weight = 79.2 × 145 = 11,484 lbs (5,209 kg) = 5.74 tons (5.21 tonnes). Most residential jobs come in well under one truckload.
Thickness reference
Recommended thickness and approximate coverage per ton for common asphalt applications. Coverage assumes standard hot mix asphalt at 145 lb/cu ft (2,323 kg/m³). Thinner mixes and millings cover slightly more, dense-graded mixes slightly less.
| Application | Thickness | Coverage / ton (sq ft) |
|---|---|---|
| Residential driveway | 2.5″ | 64 sq ft |
| Commercial driveway | 3″ | 53 sq ft |
| Parking lot (light) | 3″ | 53 sq ft |
| Parking lot (heavy) | 5″ | 32 sq ft |
| Pothole patch | 3″ | 53 sq ft |
Density reference
Bulk density and tonnage rate for common asphalt mixes. These are typical loose values for delivered material. Compacted asphalt is slightly denser. Pull the exact figure from your supplier’s spec sheet for precise calculations.
| Type | Density (lb/ft³) | Tons / yd³ | Common use |
|---|---|---|---|
| Hot mix asphalt (HMA) | 145 lb/ft³ | 1.96 | Standard paving |
| Asphalt millings | 120 lb/ft³ | 1.62 | Driveways, base layers |
| Cold patch | 140 lb/ft³ | 1.89 | Pothole repair |
| Dense-graded mix | 150 lb/ft³ | 2.03 | Heavy traffic |
| Open-graded (porous) | 130 lb/ft³ | 1.76 | Drainage applications |
Frequently asked questions
How to calculate asphalt tonnage?
Multiply length × width × thickness to get cubic feet (or cubic meters) of asphalt. Multiply that by the density of your mix to get weight. Standard hot mix asphalt, also called blacktop, runs 145 lb/cu ft (2,323 kg/m³). Divide pounds by 2,000 to get tons (or kilograms by 1,000 for tonnes). Add 5-10% on top for compaction loss and cutting waste.
Worked example: a 20 ft × 10 ft (6 m × 3 m) driveway at 3 inches (7.5 cm) thick. Volume = 200 × 0.25 = 50 cu ft (1.42 m³). Weight = 50 × 145 = 7,250 lbs (3,289 kg). Tons = 7,250 / 2,000 = 3.6 tons (3.29 tonnes). Round to 4 tons (3.6 tonnes) once you add 10% for waste.
Is 2 inches of asphalt enough for a driveway?
For a typical residential driveway over a well-prepared base, 2 inches (5 cm) of compacted hot mix is usable but on the thin side. 3 inches (7.5 cm) is the more common spec because it gives a longer service life and handles occasional heavier vehicles like delivery trucks. If the base isn't well compacted, or the driveway sees heavy vehicles regularly, go to 4 inches (10 cm) or split it into 2.5 inches base course plus 1.5 inches surface course. Commercial pavement typically runs 4-6 inches (10-15 cm) total.
How many sq ft will 1 ton of asphalt cover?
At standard hot mix density, 1 ton (0.91 tonnes) covers about 80 sq ft (7.4 m²) at 2 inches (5 cm) thick. Coverage drops as thickness increases: 53 sq ft (4.9 m²) at 3 inches (7.5 cm), 40 sq ft (3.7 m²) at 4 inches (10 cm), 27 sq ft (2.5 m²) at 6 inches (15 cm). Asphalt millings are lighter than hot mix and cover about 20% more area per ton. Actual coverage shifts a bit with mix density, so check your supplier's spec sheet for an exact figure.
Can I use this calculator with metric measurements?
Yes. Use the Imperial / Metric toggle at the top of the calculator. The form switches between feet/inches and meters/centimeters, density inputs flip between lb/cu ft and kg/m³, and the results show tons, cubic yards, and square feet in imperial mode or tonnes, cubic meters, and square meters in metric mode. Reference tables and FAQ examples carry both units throughout the page.
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