Asphalt Calculator – Get Fast, Accurate Estimates
Use this free asphalt calculator to estimate how much hot mix asphalt (HMA) you need for driveways, parking areas, paths, and paving projects. Enter your dimensions and thickness, add a waste factor, and get results in cubic feet, cubic yards, tons, and tonnes. This helps you order the right amount the first time and avoid delays or costly overages.
How Much Asphalt Do I Need? (Quick Rule of Thumb)
A handy shortcut is: each inch of asphalt thickness equals about 0.00604 tons per square foot. For example, a 1,000 ft² driveway at 3 inches thick is roughly 18.1 tons.
Tons of Asphalt per 1,000 ft² by Thickness
| Thickness | ft³ per 1,000 ft² | yd³ per 1,000 ft² | Tons @ 145 lb/ft³ |
|---|---|---|---|
| 2 in | 166.67 | 6.17 | 12.08 |
| 3 in | 250.00 | 9.26 | 18.13 |
| 4 in | 333.33 | 12.35 | 24.17 |
| 6 in | 500.00 | 18.52 | 36.25 |
Values are approximate; calculator results may vary with selected waste %, density, and unit system.
Recommended Asphalt Thickness by Use
- 2–3 inches: Residential driveways, light passenger vehicles.
- 4–6 inches: High-traffic lanes, light commercial lots.
- 6+ inches: Heavy-duty areas, trucks, loading zones.
Thickness depends on climate, subgrade strength, and traffic. If you’re replacing old pavement, you may also consider milling before resurfacing.
Base Prep, Compaction, and Density
Long-lasting asphalt starts with a well-compacted, well-drained base. Typical hot mix density averages around 145 lb/ft³, but mixes vary. Confirm with your supplier for the most accurate weight, especially for bidding or large orders. Adding a 5–10% waste/overage factor helps account for irregular edges, overlap, and site conditions.
Formulas Used by the Calculator
(Length × Width × Thickness in feet) ÷ 27 = Cubic Yards
(Cubic Feet × Density) ÷ 2000 = Tons (Density default 145 lb/ft³)
Related Calculators
Refining or resurfacing an existing surface? Try the Asphalt Milling Calculator. Comparing paving options and budgets? Use the Driveway Cost Estimator.