How Asphalt Tonnage Is Calculated

Asphalt tonnage starts the same way as any volume calculation — area × thickness — but then converts to weight using a typical hot-mix asphalt density of about 145 lbs per cubic foot (roughly 3,900 lbs per cubic yard).

Residential driveways typically use 2–3 inches of asphalt over a compacted gravel base; commercial areas often use 3–4 inches or more to handle heavier traffic.

The Asphalt Calculator handles the thickness-to-tonnage conversion automatically, with a waste allowance built in.

A thin tack coat of liquid asphalt is usually sprayed between the gravel base and the hot-mix layer to bond them. It's priced separately from the tonnage figure here, so budget for it as a small additional line item rather than folding it into the asphalt order itself.