Asphalt volume and tonnage calculator

For a rectangular paving area with a specified layer thickness. Use density consistent with the layer state being estimated.

Paving dimensions

Length, width and thickness of one asphalt layer.

Density and allowance

Mass per volume (kg/m³ in metric mode or lb/ft³ in imperial mode) and an extra percentage. The same percentage is applied to both volume and mass.

A single rectangular layer per calculation, with base and allowance-adjusted results shown separately.

• Base volume and mass, followed by volume and mass including the chosen allowance. Metric results use m³ and metric tonnes; imperial volume can switch between ft³ and yd³, and mass between US tons and pounds.

One layer with a selected density and 15% allowance.

Volume = length × width × thickness; mass = volume × density. Multiplying each unrounded base quantity by 1.15 gives the adjusted estimate. The example keeps 0.8625 m³ so the arithmetic remains visible; do not calculate mass from a rounded volume. 2070 kg equals 2.070 metric tonnes, the mass unit used by the metric app result.

Density is an input, not a material diagnosis. Compaction, delivery temperature, paving losses and layer specification must come from the actual job; 15% is only the example allowance.

Metric and imperial lengths, volumes and masses are supported. Check whether a quoted ton means a US ton, UK ton or metric tonne before comparing quantities.

Does the app choose pavement thickness?

No. Enter the layer thickness specified for the surface and loads.

Can I combine base and wearing courses?

Calculate separately when thickness or density differs, then sum compatible mass units.