Asphalt & Paving Calculators
Tonnage, installed cost and maintenance figures for asphalt work.
Asphalt calculators convert a driveway, car park or road surface into the two numbers a paving job runs on: tonnage and installed cost. Asphalt is ordered by weight but measured by area and depth, so every estimate passes through a density conversion — 145 lb per cubic foot for compacted hot mix — that is easy to get wrong and expensive to get wrong twice.
These tools handle that conversion, apply realistic regional pricing, and show the formula so you can check any figure against a contractor quote.
Calculators in this category
Who these calculators are for
Homeowners pricing a driveway
Paving quotes vary enormously, and without a tonnage figure there is no way to tell whether the spread reflects real differences in scope or just what each contractor thinks you will pay. Knowing a 20 × 40 ft drive at 3 inches needs about 14.5 tons gives every quote something to be measured against.
Contractors and estimators
Fast tonnage and cost takeoffs for driveways, car parks and road sections, including base gravel, overlay depth and sealcoat coverage.
Property and facilities managers
Car park resurfacing, crack filling and sealcoating are recurring budget lines. Modelling overlay against full replacement is usually a 40–60% swing, and it needs numbers before it can be argued.
Anyone weighing repair against replacement
Overlay, patching and sealcoating each buy a different number of years for a different price. Comparing them properly means costing all three on the same surface area.
How they help
They convert area and depth to tons
The working shortcut is square feet × depth in inches × 0.006042, which comes from 145 lb/ft³ ÷ 12 ÷ 2,000. Suppliers sell by the ton, so this is the conversion every asphalt order depends on.
They cost the base, not just the surface
A paved surface is a stack: compacted subgrade, aggregate base, then asphalt. Estimating the asphalt alone understates a full installation substantially, because the base is often the larger share of the material.
They compare maintenance options
Sealcoating, crack filling, overlay and full replacement sit at very different price points and lifespans. Costing them against the same area is the only way to see which is actually cheaper per year.
They make regional pricing visible
Hot mix moves with oil prices and haul distance. Cost figures are stated as ranges with the assumption shown, rather than a single national number presented as fact.
Worth saving for next time
Asphalt is a maintenance material, not a one-off purchase. A driveway paved this year needs sealing in two, crack filling in four and a decision about overlay in ten — and each of those is the same surface area run through a different calculation.
Keeping the set in one place means the area you measured once carries through every future decision, as a shareable link or a printed sheet. Bookmark the hub rather than a single tool.
Asphalt & Paving guides
Asphalt vs Concrete Driveway — Asphalt installs at $4–$7 per square foot and concrete at $6–$12 — but the upfront price is the least interesting difference. Here is the comparison over the life of the driveway.
Asphalt & Paving calculator FAQ
How do I calculate asphalt tonnage?
Multiply the area in square feet by the depth in inches, then by 0.006042. A 20 × 40 ft driveway at 3 inches is 800 × 3 × 0.006042 = 14.5 tons. That factor assumes compacted hot mix at 145 lb per cubic foot.
How much does an asphalt driveway cost?
Typically $4–$7 per square foot installed in the US, so a 20 × 40 ft driveway lands around $3,200–$5,600. Site access, base condition, removal of an existing surface and haul distance from the plant move that range considerably.
How thick should an asphalt driveway be?
Two to three inches of compacted asphalt over a properly prepared 4–8 inch aggregate base for residential use. Thicker asphalt on a poor base performs worse than thinner asphalt on a good one — the base does most of the structural work.
How much does asphalt weigh per cubic yard?
About 3,915 lb compacted, which is 145 lb per cubic foot × 27. Just under two tons per cubic yard.
Is sealcoating worth it?
On a sound surface, yes — it is inexpensive per square foot and slows oxidation and water ingress. On a surface that is already cracking or failing structurally it is cosmetic, and the money is better spent on crack filling or an overlay.
When should I overlay instead of replacing?
Overlay works when the base is sound and the damage is surface-level, and typically saves 40–60% against full replacement. If there is alligator cracking, sinking or drainage failure, the base has gone and an overlay will fail with it.