Estimate the asphalt required for a driveway, road or path. Enter the length, width and depth in your chosen unit (metres, feet or inches) to get the volume, the estimated weight and the tonnes of asphalt to order.
Choose the unit you are measuring in, then enter the length, width and depth of the area to be surfaced. The calculator converts everything to metres, works out the volume, and applies a typical compacted asphalt density of 2,400 kg/m³ (2.4 t/m³) to estimate the weight and tonnes to order.
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An asphalt calculator works out how much hot-mix asphalt you need for a driveway, path or roadway from the area and the compacted depth. Always round up and add a small margin for waste and uneven sub-base.
Residential driveways are usually 50–75 mm (2–3 in) of compacted asphalt over a prepared base. Heavier traffic needs 75–100 mm or more.
Hot mix cools and compacts, edges waste material, and sub-bases are rarely perfectly level. A 5–10% margin avoids running short mid-pour.