How to use this calculator
- Enter or choose units.
- Enter or choose length.
- Enter or choose width.
- Enter or choose compacted thickness.
- Enter or choose compacted density.
- The asphalt to order updates as you type. Use Copy result or Share to keep it.
Method
Tonnes = L × W × t × ρ × (1 + Waste) ÷ 1000
- L, W
- paved length and width
- t
- compacted layer thickness
- ρ
- compacted density in kg/m³
Worked example
- Volume = 100 × 7 × 0.05 = 35 m³.
- Mass = 35 × 2400 = 84,000 kg = 84 t.
- With 5% waste: 84 × 1.05 = 88.2 t (97.22 US tons).
A 100 m × 7 m road with a 50 mm course needs about 88.2 tonnes of asphalt including 5% waste.
What the result means
Calculate each course (base, binder, surface) separately because their thickness and density differ. Loose material is laid thicker than its compacted thickness.
Assumptions and limits
- Uniform compacted thickness over a rectangular area.
- Tack coat, kerbs and patching are not included.
Questions
What is a typical asphalt density?
Dense-graded hot-mix asphalt is commonly around 2.3–2.4 t/m³ when compacted, but each mix design states its own value.
Metric tonne or US ton?
A metric tonne is 1000 kg; a US short ton is 2000 lb (907.2 kg). Both are shown.
Please note: Quantities are estimates. Confirm requirements with your engineer or supplier before ordering materials.