Calculate asphalt tonnage from area and thickness. Get total mix weight, bitumen and aggregate quantities, and optional cost estimate.
Tonnage is the total weight of asphalt mix required for your project. It is calculated as volume (area × thickness) multiplied by the compacted mix density.
Standard HMA: 2250–2400 kg/m³ (140–150 lb/ft³). Porous/OGFC: 1800–2100 kg/m³. SMA: 2250–2350 kg/m³.
Always add 5–10% to calculated tonnage for compaction loss and material wastage. Larger projects (1000+ t) can use 5%; smaller jobs may need 10%.
Enter dimensions to calculate
Estimated tonnage at different densities. Add 5–10% for wastage and compaction.
| Thickness | 2250 kg/m³ | 2300 kg/m³ | 2350 kg/m³ | 2400 kg/m³ |
|---|---|---|---|---|
| 30 mm | 6.75 t | 6.90 t | 7.05 t | 7.20 t |
| 50 mm | 11.25 t | 11.50 t | 11.75 t | 12.00 t |
| 75 mm | 16.88 t | 17.25 t | 17.63 t | 18.00 t |
| 100 mm | 22.50 t | 23.00 t | 23.50 t | 24.00 t |
| 150 mm | 33.75 t | 34.50 t | 35.25 t | 36.00 t |
Understanding the calculation helps you verify results and spot errors before placing a material order.
Multiply the paved area (length × width in metres) by the compacted layer thickness converted to metres. A 200 m road, 7 m wide, at 75 mm = 0.075 m gives a volume of 200 × 7 × 0.075 = 105 m³.
Multiply the volume by the compacted mix density. Dense HMA is typically 2,350 kg/m³. Using our example: 105 m³ × 2,350 kg/m³ = 246,750 kg. Divide by 1,000 to convert to 246.75 metric tonnes.
Theoretical tonnage never accounts for compaction variation, truck residue, or edge waste. Always order 5–10% extra. For our 246.75 t example, add 7% → order 264 tonnes to complete the job without a costly second delivery.
Total mix weight splits into bitumen binder and aggregate. At a typical 5.5% bitumen content: 246.75 t × 0.055 = 13.57 t of bitumen and 246.75 − 13.57 = 233.18 t of aggregate. Use the Material Calculator to get a full material breakdown by mix design.
Accurate tonnage estimates drive procurement, logistics, and budgeting across every paving project type.
Municipal and state road projects require precise tonnage schedules to co-ordinate asphalt plant production, trucking rosters, and paving crew shifts. A typical two-lane rural road (7 m wide, 50 mm surface + 100 mm binder over 1 km) requires approximately 350–400 tonnes of total mix. Use the Road Calculator for multi-layer road estimates including subbase and binder courses.
Residential driveways typically use 40–50 mm of compacted HMA. A standard double driveway (6 m × 12 m = 72 m²) at 50 mm and 2,350 kg/m³ requires just under 8.5 tonnes. Car parks with heavy vehicle access (buses, trucks) may need 75–100 mm of binder course plus 40 mm surface, pushing tonnage above 35 t per 100 m². See the Cost Calculator to price these projects.
Pothole and pavement repair crews use tonnage calculators to pre-load trucks with the correct amount of cold-mix or hot-mix patch material. A 2 m × 2 m pothole at 80 mm depth needs roughly 0.75 tonnes of patch mix. Ordering too little means a return trip; too much means wasted heated mix. The Repair Calculator handles irregular repair areas quickly.
Input the length and width of your pavement area (or total area directly), and the compacted layer thickness. Use metres and mm for metric, or feet and inches for imperial input. A standard 2-inch driveway overlay over 1,000 sq ft typically requires around 2.5 short tons of asphalt mix.
Choose your asphalt mix type to load the default density. Standard Hot Mix Asphalt (HMA) is approximately 2300–2400 kg/m³ (145–150 lb/ft³). Open-graded friction course (OGFC) is lighter at 1950–2100 kg/m³. For maximum accuracy, enter the density from your laboratory mix design or supplier specification sheet.
Click Calculate to see total asphalt tonnage in metric tonnes, short tons (US), and kilograms. Results include bitumen and aggregate component weights. Add a 5–10% waste factor for irregular areas, hand-work around edges, and compaction variability before placing your supplier order.
A metric tonne equals 1,000 kg (2,204.6 lbs). A US short ton equals 2,000 lbs (907 kg). Asphalt suppliers in the US typically quote in short tons, while most of the rest of the world (including Australia, UK, and Canada) use metric tonnes. The difference is about 10%: 1 metric tonne = 1.102 short tons. Always confirm which unit your supplier is quoting in to avoid costly ordering errors.
Standard Hot Mix Asphalt (HMA/dense-graded) has a compacted density of approximately 2300–2400 kg/m³, commonly estimated at 2350 kg/m³. Stone Matrix Asphalt (SMA) is slightly heavier at 2300–2380 kg/m³. Open-graded mixes are lighter at 1950–2100 kg/m³. For the most accurate results, use the actual density from your project's mix design or the plant's mix design report.
For a 50 mm (2-inch) thick compacted HMA layer at 2350 kg/m³: 0.05 m × 2350 kg/m³ = 117.5 kg/m² = 0.1175 tonnes/m². A 100 m² area at 50 mm thickness requires approximately 11.75 tonnes. For a 25 mm (1-inch) layer, halve that to 5.875 tonnes. Our calculator handles this automatically — just enter your dimensions and density.
Yes. Always add a waste/overage factor when ordering asphalt. For straightforward machine-laid rectangular areas, add 5–8%. For irregular shapes, hand-work areas, driveways with curves, or projects with multiple thin lifts, use 10–15%. Material left in trucks (truck tare), cold joints, and compaction density variation also contribute to waste. It's better to have a small surplus than to run short and wait for a second delivery.
For a typical residential driveway, a 50 mm compacted HMA layer at 2,350 kg/m³ requires approximately 0.1175 tonnes per m². A single-car driveway of 3 m × 10 m (30 m²) needs around 3.5 tonnes. A double driveway of 6 m × 12 m (72 m²) needs approximately 8.5 tonnes. Add 10% for edges and waste, giving a final order of around 9.5 tonnes. Use our Square Feet Calculator if you measured in imperial units.
Multiply the area in m² by the thickness in metres, then by the density in kg/m³, then divide by 1,000 to get tonnes. For example: 500 m² × 0.05 m (50 mm) × 2,350 kg/m³ ÷ 1,000 = 58.75 tonnes. If you only know the area in square metres and need a quick estimate, a rule of thumb for 50 mm HMA is approximately 0.12 t/m². Our Square Metres Calculator automates this conversion.
Standard Hot Mix Asphalt (HMA) contains approximately 4.5–6.5% bitumen binder by total mix weight. Surface course mixes tend towards the higher end (5.5–6.5%) for durability and waterproofing, while base course mixes may be lower (4–5%). Stone Mastic Asphalt (SMA) uses 6–7.5% due to its gap-graded aggregate skeleton requiring more binder to fill voids. Always use the bitumen content from your approved mix design rather than a default estimate for procurement calculations.