Asphalt Calculator
A 12×40 ft driveway at 3" thick needs 8 tons of hot-mix asphalt. Installed cost: $2,400-4,800 ($5-10/sqft). Materials only: $1,200-2,000.
Asphalt Calculator
Enter your project dimensions for instant results.
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How to Calculate Asphalt
The formula converts dimensions to tons:
tons = (length_ft × width_ft × thickness_in / 12) × 145 / 2000
Or simplified: tons = (sqft × thickness_in) / 165.3
| Application | Total Thickness | Layers |
|---|---|---|
| Residential driveway | 2-3″ | Single course over 6-8″ gravel base |
| Heavy-use driveway (trucks) | 3-4″ | 2″ binder + 1.5-2″ surface |
| Parking lot | 3-4″ | 2″ binder + 1.5-2″ surface |
| Private road | 4-6″ | 2.5″ binder + 2″ surface |
| Municipal road | 6-8″+ | Multiple lifts + base course |
| Overlay / resurfacing | 1.5-2″ | Single surface course |
| Component | Cost per sqft |
|---|---|
| Gravel base (new) | $1.00-2.00 |
| Hot-mix material | $2.50-4.00 |
| Labor + equipment | $2.00-4.00 |
| Sealcoating | $0.15-0.25 |
| Total (new driveway) | $5.00-10.00 |
| Overlay (existing base) | $3.00-6.00 |
Common Mistakes:
- Ordering too thin — a 1.5" driveway will crack within 2 years; minimum 2" for residential
- Not preparing the base — asphalt is only as good as the gravel base beneath it
- Paving in cold weather — asphalt cools too fast below 50°F for proper compaction
- DIY attempts — hot-mix requires specialized equipment; cold-patch is only for small repairs, not driveways
- Skipping sealcoat — first application at 6-12 months, then every 2-3 years, doubles asphalt lifespan
Frequently Asked Questions
How much does a ton of asphalt cover?
One ton of hot-mix asphalt covers approximately 80 square feet at 2" thick, or 54 square feet at 3" thick. The exact coverage depends on mix density and compaction, but 145 lbs/cubic foot is the standard calculation weight.
How much does it cost to pave a driveway?
A typical 12×40 ft (480 sq ft) asphalt driveway costs $2,400-4,800 installed. This includes gravel base preparation, hot-mix material, paving, and compaction. An overlay (repaving over existing asphalt) costs $1,500-3,000 for the same area.
How long does an asphalt driveway last?
A properly installed and maintained asphalt driveway lasts 15-20 years. Regular sealcoating (every 2-3 years, $0.15-0.25/sqft) and prompt crack repair are essential. Without maintenance, expect 8-12 years before major repairs are needed.
What is the difference between asphalt and concrete driveways?
Asphalt costs $5-10/sqft installed vs $8-18 for concrete, and is faster to install (usable in 2-3 days vs 7 days). Concrete lasts 25-30 years vs 15-20 for asphalt but can't be resurfaced — only replaced. Asphalt handles freeze-thaw better; concrete handles heat better.
Can I pave asphalt myself?
Asphalt driveways are not a practical DIY project. Hot-mix requires a paver machine and vibratory roller (rental: $500-1,000/day), and the material cools rapidly. Cold-patch asphalt is available in bags for pothole repairs but is not suitable for new driveways — it never achieves the density and durability of hot-mix.
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