Asphalt Tonnage Calculator for Driveways
Calculate the tons of asphalt needed for a driveway from area, thickness, and mix density, with a cost estimate.
Reviewed by Abdullah, Technical Content Specialist
Formula
Tons = (Length x Width x Thickness/12 x Density) / 2000
Multiply the paving area length and width in feet to get square footage. Multiply by thickness in feet (inches divided by 12) to get volume in cubic feet. Multiply by asphalt density (typically 145 lbs/cuft) to get weight in pounds, then divide by 2000 to convert to short tons.
Worked Examples
Example 1: Residential Driveway
Problem:Calculate asphalt needed for a 60 x 12 ft driveway at 2 inches thick.
Solution:Area = 60 x 12 = 720 sq ft\nVolume = 720 x (2/12) = 120 cu ft\nWeight = 120 x 145 = 17,400 lbs\nTons = 17,400 / 2000 = 8.70 tons
Result:8.70 tons | ~$870 material cost at $100/ton
Example 2: Parking Lot
Problem:Calculate asphalt needed for a 200 x 100 ft parking lot at 3 inches thick.
Solution:Area = 200 x 100 = 20,000 sq ft\nVolume = 20,000 x (3/12) = 5,000 cu ft\nWeight = 5,000 x 145 = 725,000 lbs\nTons = 725,000 / 2000 = 362.50 tons
Result:362.50 tons | 19 truck loads
Frequently Asked Questions
How do I calculate how much asphalt I need in tons?
Multiply the length by width of the paving area in feet to get square footage. Multiply by the thickness in feet (divide inches by 12) to get cubic feet of volume. Multiply the volume by the asphalt density, typically 145 to 150 pounds per cubic foot for hot mix asphalt, to get the total weight in pounds. Divide by 2000 to convert to short tons. For a standard 2-inch thick residential driveway, you will need approximately one ton per 80 square feet of area.
What is the standard thickness for an asphalt driveway?
A residential asphalt driveway should be 2 to 3 inches thick for the surface course over a properly compacted aggregate base of 6 to 8 inches. Commercial parking lots typically require 3 to 4 inches of asphalt. Heavy-duty areas like truck loading docks may need 4 to 6 inches. The total pavement thickness includes both the asphalt and base layers. Thicker applications are installed in multiple lifts of 1.5 to 2 inches each, with each lift compacted before the next is applied.
How much does asphalt cost per ton installed?
Asphalt material costs typically range from $80 to $150 per ton depending on the mix design and your location. Installation costs add another $3 to $7 per square foot for a complete job including grading, base preparation, and paving. A standard residential driveway of 600 square feet with 2 inches of asphalt uses about 7.5 tons and costs roughly $3,000 to $6,000 installed. Prices fluctuate with oil prices since asphalt is a petroleum product. Get at least three quotes from licensed contractors.
What is the density of hot mix asphalt?
Standard hot mix asphalt (HMA) has a compacted density of approximately 145 to 150 pounds per cubic foot, depending on the mix design and aggregate type. Superpave mixes typically compact to 145 to 148 lbs per cubic foot. Open-graded friction course (OGFC) is lighter at about 130 lbs per cubic foot due to higher air voids. Warm mix asphalt (WMA) has similar compacted densities to HMA. For estimating purposes, 145 lbs per cubic foot is the most commonly used value and provides conservative estimates.
References
Reviewed by Abdullah, Technical Content Specialist · Editorial policy