Asphalt Calculator
Estimate hot-mix asphalt tonnage from area, thickness and density for driveways and paths. Includes volume in cubic yards and a worked 600 ft² example.
Results
Asphalt needed
- Volume
- 5.56 yd³
- Cubic feet
- 150 ft³
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Educational estimates · not financial advice · free, no signup
Formula / how it works
Volume (ft³) = area(ft²) × thickness(in)/12. Tons ≈ volume × density ÷ 2000. Default density 145 lb/ft³.
Detailed guide
What it is, how to use it, how to read the numbers, common mistakes, a worked example, formulas, and FAQs.
What this calculator is
Asphalt is ordered by the ton, but you measure by area and thickness. This calculator converts the two into volume, multiplies by density, and returns the weight in tons plus cubic yards and cubic feet. It is intended for driveways, parking pads and paths. Contractors usually add an allowance for compaction, edges and base irregularities, and thickness requirements depend on the use and the base. Treat the result as an estimate to discuss with a supplier, not a quote.
When to use / who it helps
- You are planning a driveway or path and want the tonnage.
- You are comparing quotes from contractors.
- You are estimating cost from a price per ton.
- You want to know the volume in cubic yards.
- You are checking the effect of different thickness choices.
How to use
Steps
- Measure the area in square feet by multiplying length by width.
- Enter the compacted thickness in inches.
- Keep the density at 145 lb/ft³ or enter the supplier's value.
- Read the tons required.
- Read the volume in cubic yards.
- Add a margin for waste and edges.
How to interpret results
- Thickness has a direct linear effect, so doubling it doubles tons.
- Density depends on the mix and compaction.
- Typical residential driveway thickness is a few inches, depending on base and traffic.
- Order slightly more than the estimate.
- Prices per ton vary by region and by mix.
Common mistakes & gotchas
- Entering the uncompacted thickness.
- Forgetting the base layer, which is separate.
- Mixing metres with feet.
- Not adding any margin.
- Using the wrong density.
Worked example
Worked example — 600 ft² at 3 inches
- Volume: 600 × 3 ÷ 12 = 150 ft³.
- Weight: 150 × 145 = 21,750 lb.
- Tons: 21,750 ÷ 2,000 = 10.875, shown as 10.88 tons.
- Cubic yards: 150 ÷ 27 ≈ 5.56 yd³.
Result: About 10.9 tons of asphalt for 600 ft² at 3 inches.
To load the form's own demo values, tap Try example above the Calculate button.
How to calculate / formula
Volume (ft³) = area(ft²) × thickness(in)/12. Tons ≈ volume × density ÷ 2000. Default density 145 lb/ft³.
Frequently asked questions
How many tons of asphalt do I need?
Multiply area by thickness in feet and by the density, then divide by 2,000.
What density should I use?
Typical hot mix is 140–150 lb/ft³; ask your supplier for the exact figure.
How thick should a driveway be?
It depends on traffic and base. Ask the contractor for the recommended spec.
Does this include the base?
No. Gravel base is a separate quantity.
How much extra should I order?
Many people add a modest margin, but confirm with the contractor.
Can I use metric units?
Convert to feet and inches first.