Asphalt Calculator

How to Calculate Asphalt

Asphalt (hot mix asphalt or HMA) is ordered by the ton. The weight depends on the volume of the paved area — length × width × thickness — multiplied by asphalt's density of approximately 145 lb per cubic foot.

Standard Asphalt Thicknesses

• 2 inches — Overlay or patching over existing asphalt. Not for new construction.
• 3 inches — Standard residential driveway (passenger vehicles only).
• 4 inches — Heavy-duty residential (trucks, RVs, boats on trailers).
• 6+ inches — Commercial parking lots and roads.

All asphalt installations require a compacted aggregate base beneath the asphalt — typically 6–8 inches of crushed stone. Use the Gravel Calculator to estimate the base material separately.

The Bottom Line

Asphalt paving is almost always a contractor job — you need a hot plant to produce the mix, a dump truck to deliver it (it must be placed while hot), and a roller to compact it. But knowing the tonnage before you call for quotes keeps contractors honest and helps you compare bids apples-to-apples. Enter your dimensions, get the tonnage, and ask contractors to quote based on that specific quantity. Material costs are verifiable — the hot plant's price per ton is publicly quoted.