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2" residential driveway · 3–4" commercial
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🛣️ Note: Always add 5–10% waste for irregular shapes and cutting. Get multiple contractor quotes — prices vary by region and season. Spring and summer installations typically cost more due to higher demand.
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How to Calculate Asphalt Tonnage
Asphalt is sold and ordered by the ton. To calculate how many tons you need, convert your area to cubic feet, multiply by the asphalt density, then convert pounds to tons.
Asphalt Tonnage Formula
Tons = (Length × Width × Thickness in ft × Density lbs/ft³) ÷ 2,000
Example: 60 ft × 20 ft driveway, 2" thick (0.167 ft), standard density:
Volume = 60 × 20 × 0.167 = 200.4 cubic feet
Weight = 200.4 × 145 = 29,058 lbs
Tons = 29,058 ÷ 2,000 = 14.5 tons (+ 5% waste = 15.2 tons)
Volume = 60 × 20 × 0.167 = 200.4 cubic feet
Weight = 200.4 × 145 = 29,058 lbs
Tons = 29,058 ÷ 2,000 = 14.5 tons (+ 5% waste = 15.2 tons)
Coverage Rule of Thumb
- 1.5 inches thick — 1 ton covers ~107 sq ft
- 2 inches thick — 1 ton covers ~80 sq ft (most common residential)
- 3 inches thick — 1 ton covers ~53 sq ft
- 4 inches thick — 1 ton covers ~40 sq ft (commercial / heavy use)
💡 Pro tip: A proper compacted gravel base (4–6 inches) is as important as the asphalt layer itself. Skipping it causes premature cracking and rutting. Include base preparation in your budget — it typically adds $1–$2 per sq ft to total project cost.
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Frequently Asked Questions
How do I calculate asphalt tonnage?
Multiply length × width × thickness in feet to get cubic feet. Multiply by 145 (asphalt density lbs/ft³), then divide by 2,000 to get tons. Add 5–10% for waste. For a 60×20 ft driveway at 2 inches: (60 × 20 × 0.167 × 145) ÷ 2000 ≈ 14.5 tons.
How much does a ton of asphalt cover at 2 inches?
One ton of hot mix asphalt covers approximately 80 square feet at 2 inches thick. This rule is widely used for residential driveway estimates. Coverage decreases proportionally with thickness — at 4 inches, one ton covers about 40 square feet.
What is the density of asphalt?
Hot mix asphalt (HMA) has a standard density of approximately 145 lbs per cubic foot (2,322 kg/m³). Dense-graded mixes may reach 148 lbs/ft³; open-graded mixes may be around 140 lbs/ft³. Most calculations use 145 lbs/ft³ as the default.
How thick should a residential driveway be?
Residential driveways typically use 2–3 inches of asphalt over a 4–6 inch compacted gravel base. Two inches works for light passenger vehicles; add a third inch for heavy trucks or SUVs. The gravel base is critical — skipping it causes premature cracking.
How much does asphalt cost per ton?
Asphalt costs $85–$150 per ton for hot mix at the plant, depending on oil prices and region. Delivered and installed, expect $100–$200 per ton including labor. Total installed driveway costs typically run $2–$5 per square foot depending on thickness and local rates.