How Much Asphalt Do I Need?
Calculate the exact amount of hot mix asphalt for driveways, parking lots, and road repairs. Get results in tons and cubic yards with cost estimates.
Quick Answer
A 12×40 ft driveway at 3 inches thick needs about 4.4 cubic yards (~9 tons) of hot mix asphalt, costing roughly $445–$890 for material.
Enter your dimensions above to calculate asphalt needed.
💡 1 ton of hot mix asphalt covers approximately 36 sq ft at 3 inches thick
How to Calculate Asphalt Needed
Formula
Length (ft) × Width (ft) × Thickness (in) ÷ 324 = Cubic Yards
Multiply your area's length by width to get square footage. Multiply by thickness in inches, then divide by 324 to convert to cubic yards. Multiply cubic yards by 2.025 to get tons of hot mix asphalt.
Example
For a 12 ft × 40 ft driveway at 3 inches thick: 12 × 40 × 3 ÷ 324 = 4.44 cubic yards. At 2.025 tons per cubic yard, that's about 9 tons of asphalt.
Tips & Best Practices
- •Residential driveways typically need 2–3 inches of asphalt over a 6–8 inch compacted gravel base.
- •Hot mix asphalt (HMA) weighs approximately 2.025 tons per cubic yard — significantly heavier than gravel.
- •Asphalt should be compacted immediately while hot (275–300°F). Rent or hire a roller for best results.
- •For overlays (resurfacing an existing driveway), 1.5–2 inches is usually sufficient.
Quick Reference
1 ton of hot mix asphalt covers approximately 36 sq ft at 3 inches thick
Frequently Asked Questions
How much does a ton of asphalt cost?+
Hot mix asphalt costs $100–$200 per ton for material, depending on location and oil prices. A full driveway pave (12×40 ft) typically costs $2,500–$6,000 professionally installed, or $900–$1,800 in material for DIY.
How thick should an asphalt driveway be?+
Residential driveways need 2–3 inches of compacted asphalt over a 6–8 inch gravel base. Commercial lots and heavy-traffic areas should use 3–4 inches of asphalt.
How many square feet does a ton of asphalt cover?+
One ton of hot mix asphalt covers approximately 36 sq ft at 3 inches thick, or about 54 sq ft at 2 inches thick. Coverage depends on compaction and material mix.
Can I lay asphalt over an existing driveway?+
Yes — asphalt overlay (1.5–2 inches) over existing asphalt is common and cheaper than full removal. The existing surface must be stable, without major cracks or heaving. Clean and apply tack coat first.