Asphalt Calculator

Most residential driveways need 2 to 3 inches of compacted hot-mix asphalt laid over a 4 to 8 inch gravel base. If you park RVs, delivery trucks, or other heavy vehicles on the surface, use 4 inches to prevent cracking and rutting under the extra load.

The calculator converts the entered finished volume using 145 lb per cubic foot, a compacted hot-mix estimate. It does not add a separate loose-to-compacted volume factor. Confirm lift thickness, mix density, yield, and order allowance with the asphalt supplier.

Asphalt typically runs $7 to $13 per sq ft installed; concrete runs $8 to $18 per sq ft. Asphalt wins on upfront cost and cures faster, but it needs sealcoating every 3 to 5 years and has a shorter lifespan. Concrete costs more initially but requires less maintenance over 30-plus years.

You can walk on fresh asphalt after 24 to 48 hours and drive passenger vehicles on it after 3 to 5 days. Full curing takes 6 to 12 months, so avoid sharp turns in place, prolonged parking in one spot, and heavy loads during that period to prevent surface impressions.

Plan for 5 to 10 percent extra on a standard rectangular driveway to cover compaction loss, edge spillage, and minor subgrade irregularities. For irregular shapes, curves, or sloped areas, buffer up to 15 percent. Add that percentage to the tons figure the calculator gives you before placing your order.