Instantly convert square feet of asphalt to tons based on thickness and density. Fast and accurate for driveways, parking lots, and road paving projects.
Enter square footage plus thickness and get tons instantly. Perfect for quick material ordering estimates on the job site.
Standard HMA = 145 lb/ft³ (approx. 2320 kg/m³). Adjust for open-graded or porous mixes, which typically run 115–130 lb/ft³.
1 ton of standard HMA covers approximately 80–120 sq ft at 2–3 in thick. Use this to cross-check your calculations.
Enter dimensions to calculate
At standard density 145 lb/ft³ (2320 kg/m³). Values are metric tonnes; short tons shown in parentheses.
| Thickness | Metric Tonnes / 1,000 sq ft | Short Tons / 1,000 sq ft | Coverage (sq ft per short ton) |
|---|---|---|---|
| 1.5 in (38 mm) | 5.95 | 6.56 | ~152 sq ft/st |
| 2 in (50 mm) | 7.93 | 8.74 | ~114 sq ft/st |
| 2.5 in (64 mm) | 9.91 | 10.93 | ~91 sq ft/st |
| 3 in (75 mm) | 11.89 | 13.10 | ~76 sq ft/st |
| 4 in (100 mm) | 15.86 | 17.48 | ~57 sq ft/st |
The direct sq ft to tons conversion uses three inputs: area, thickness, and density. No intermediate steps needed — the formula returns US short tons directly.
Multiply length × width in feet. Example: A 2-car residential driveway 50 ft × 20 ft = 1,000 sq ft. For irregular shapes, break into rectangles and sum the areas. Use a measuring tape or count paces (1 pace ≈ 2.5 ft) for a quick field estimate.
Divide thickness by 12 to convert inches to feet. Multiply by standard density (145 lb/ft³ for most HMA). 1,000 × (2 ÷ 12) × 145 = 24,167 lb. Divide by 2,000 to get short tons: 12.1 short tons. Add 5–8% waste = order 12.7 tons.
At 145 lb/ft³, a simplified rule: ~0.0606 tons per sq ft per inch of thickness. For a 2-inch layer: multiply sq ft × 0.0121. For a 3-inch layer: sq ft × 0.0182. These shortcuts work for quick mental estimates. For precise binder/aggregate breakdown, use the full Asphalt Tonnage Calculator.
The 145 lb/ft³ default applies to most dense-graded HMA. Open-graded mixes (OGFC, porous asphalt) run 115–125 lb/ft³. SMA runs 145–155 lb/ft³. Cold mix patching compounds run around 130–135 lb/ft³. Using the wrong density can cause a 10–15% ordering error, so always confirm with your plant's certified mix design. For metric projects, use the Square Metres Calculator.
The most searched asphalt calculation in the US — homeowners, contractors, and estimators all need to convert a square footage measurement into a material order.
US homeowners replacing a residential driveway typically measure in feet and need to know how many tons to tell the asphalt plant. This calculator gives that direct answer — enter your driveway's square footage and depth, get the tons to order. Most residential plants have 5-ton minimums, so this avoids both under-ordering and costly over-ordering when scheduling a single truck delivery.
Related: Asphalt Cost Calculator
Residential and commercial paving contractors use sq ft measurements from site surveys to calculate material orders for each project. This calculator lets a contractor quickly convert a takeoff sheet (in sq ft) to a tons order without manual arithmetic errors. Multiple layers (base + surface) are calculated separately with their respective densities and thicknesses.
Related: Asphalt Tonnage Calculator
Municipal road crews and property maintenance teams measure repair areas in sq ft to estimate cold patch or hot mix material for pothole filling and utility cut patching. Entry of the patch dimensions and repair depth gives the tons needed per job site load, helping crews stock the right amount of repair material for a day's work without running short mid-route.
Related: Asphalt Repair Calculator
More tools for asphalt quantity estimation.
Type the total area in square feet. For rectangular areas, multiply length × width. For driveways with irregular shapes, break the area into rectangles and add the totals. Measure to the nearest foot for practical accuracy — sub-foot precision rarely changes the tonnage result meaningfully.
Enter the finished compacted depth in inches. Residential driveways typically require 2–3 inches of asphalt; commercial driveways and parking lots need 3–4 inches; roads and heavy-duty areas may need 4–8 inches total in multiple lifts. Use the compacted thickness, not the loose mat thickness.
The calculator returns US short tons directly from your square footage input. The formula is: tons = (sq ft × thickness in inches × density lb/ft³) ÷ (12 × 2000). Round up to the nearest half-ton for your order and add a 5–10% overage for waste and compaction variation.
The standard formula is: Tons = (Area in sq ft × Thickness in inches × Density in lb/ft³) ÷ (12 × 2,000). At 145 lb/ft³ density and 2-inch thickness, this simplifies to approximately sq ft × 0.0121. So a 500 sq ft area at 2 inches requires about 6.05 tons. Always verify with your plant since actual mix density can vary between 140–150 lb/ft³.
For a 1,000 sq ft driveway at 2-inch compacted thickness and 145 lb/ft³ density, you need approximately 12.1 tons. At 3 inches, that increases to about 18.1 tons. Order 5–10% extra to account for edges, subbase irregularities, and delivery tolerance. Confirm your plant's minimum order quantity, as many asphalt plants have a 5-ton minimum delivery.
Tonnage scales linearly with thickness because you are literally adding more material volume. Doubling the thickness doubles the weight of asphalt for the same footprint. This is why multi-lift designs (base course + binder course + surface course) stack up quickly in total tonnage. Each layer must be calculated separately if different mix types with different densities are used.
Yes — simply enter the patch area in square feet and the repair depth. For pothole repairs, measure the opening area and use the full depth of material being placed. For mill-and-fill repairs, enter the milled area and the fill thickness. Cold mix asphalt patching compounds typically have a slightly lower density than hot mix, so consider adjusting the density input down to around 135 lb/ft³ for cold patch estimates.
A US short ton equals 2,000 lb, while a metric tonne (t) equals 2,204.6 lb — about 10% heavier. When you call an asphalt plant in the United States, they almost always quote in short tons. If a plant quotes in metric tonnes, divide the short ton result from this calculator by 1.102 to get the equivalent metric tonne order. For international projects, use the Square Metres Calculator, which outputs metric tonnes by default.
Coverage per short ton at standard density (145 lb/ft³): at 1.5 inches — approximately 110 sq ft/ton; at 2 inches — approximately 83 sq ft/ton; at 2.5 inches — approximately 66 sq ft/ton; at 3 inches — approximately 55 sq ft/ton. These are commonly used on job-site order sheets. For precise estimates factoring your specific mix density, enter your actual dimensions into the calculator above rather than using coverage rules. Always verify with the plant's certified mix design data.
Yes — industry standard practice is to add 5–10% overage to the calculated tonnage before placing your order. This accounts for compaction variation (loose mat compacts approximately 20–25% by volume), edge trimming losses, load ticket rounding, and any irregular sub-base areas that need extra material. For small residential jobs under 10 tons, lean toward 10% overage. For large commercial or DOT projects, 5% overage is typically sufficient with experienced crews and quality control. Under-ordering mid-job is far more costly and disruptive than having a small surplus. See our Asphalt Cost Calculator to factor waste into your total budget.