Asphalt Calculator – Estimate Tons & Cost
Use our free asphalt calculator to estimate how many tons of asphalt you need. Enter length, width, and depth to get instant results.
Asphalt Calculator Formula
Volume (ft³) = Length × Width × Depth (ft)
How to Calculate Asphalt
- 1. Convert depth from inches to feet: Depth (ft) = Depth (in) ÷ 12
- 2. Calculate volume in cubic feet: Volume = Length × Width × Depth
- 3. Convert to cubic yards: Cubic Yards = Volume ÷ 27
- 4. Convert to tons: Tons = Cubic Yards × 1.4 (asphalt density)
Example Calculation
Let's say you're paving a 20ft × 24ft driveway that is 3 inches deep.
- length: 20
- width: 24
- depth: 3
You need approximately 1.87 cubic yards or 2.61 tons of asphalt
Tips
- Always order 5–10% extra for waste and uneven surfaces
- Asphalt density is approximately 145 lbs per cubic foot (1.4 tons per cubic yard)
- Consider compacting — asphalt settles about 25% after compaction
- For best results, schedule paving when temperatures are above 50°F (10°C)
Frequently Asked Questions
How many square feet does a ton of asphalt cover?
One ton of asphalt covers approximately 40–80 square feet depending on the depth. At 2 inches deep, a ton covers about 80 sq ft. At 4 inches deep, it covers about 40 sq ft.
How much does asphalt cost per ton?
Asphalt costs between $100–$200 per ton on average, depending on your location and the type of asphalt mix. Prices can vary significantly by region.
How thick should asphalt be for a driveway?
A residential driveway should typically be 2–3 inches of asphalt over a 4–8 inch gravel base. Commercial driveways may require 3–4 inches of asphalt.
How do I calculate how much asphalt I need?
Multiply the length × width × depth (in feet) to get cubic feet. Divide by 27 to get cubic yards. Multiply by 1.4 to convert to tons. Add 5–10% extra for waste.