Asphalt Calculator
Hot-mix tonnage from area, depth and density — with the plant’s price, the waste and the two-lift doctrine built in.
Asphalt Calculator
Results recalculate instantly on every keystroke. Nothing you type is transmitted.
What this result does not account for
- Material only — no base stone, labor or equipment.
- Rectangular areas; odd shapes compute in pieces.
- Flat 5% default waste; hand-work can run higher.
In short: A 60 × 20 ft driveway at 3 in: 21.75 tons exactly (1,200 ft² × ¼ ft × 145 lb/ft³ ÷ 2,000). Add 5% waste → 22.8375 t → $2,626.31 at $115/ton. One ton covers 55.1724 ft² at that depth.
Formula
tons = ft² × (in ÷ 12) × lb/ft³ ÷ 2,000
order = tons × (1 + waste)
coverage = 2,000 ÷ (density × in ÷ 12) ft² per ton
over 6 in = two lifts, each to density
[('145 lb/ft³', 'compacted dense-graded HMA, ordering average'), ('the bands', 'drives 2-4 in, lots 3-6, roads 4-8'), ('waste', 'curves, hand-work and the plant’s round-up'), ('two lifts', 'the only honest way past 6 inches')]
Worked Example
- Volume the area at compacted depth.
- Convert to tons at your mix’s density.
- Add waste, then round to whole tickets.
- Price it at the current plant quote.
- Check the lift plan and the density figure.
1,200 ft² at 3 in: 21.75 tons exactly (60 × 20 × ¼ × 145 ÷ 2,000), 22.8375 t with 5% waste, $2,626.31 at $115. One ton covers 55.1724 ft² at that depth — and 3 in over a prepared base is the classic residential section.
Strengths & Limits Of This Model
Where this engine is strong
- Density policed — lab maximums called out
- Coverage per ton solved at your depth
- Lift doctrine wired to the thickness you enter
Where it stops
- No base-stone line on this page
- Rectangle take-off only
Practical Use Cases
Driveways
2-4 in compacted over stone, priced by the ton.
Parking areas
3-6 in sections with real waste factors.
Overlays
2-in resurfaces without tear-out.
Quote checks
Density and coverage audited before you sign.
Lift planning
Thick sections split honestly.
Methodology & Editorial Standards
Tonnage is area × compacted depth × density ÷ 2,000, with density free-entry but warned outside 142-148 (over 150 is flagged as lab maximum, which under-orders). Waste multiplies the exact tonnage; the ticket figure rounds to whole tons. Thickness above 6 in switches the lift card to the two-lift doctrine; density below 100 is refused as not-asphalt.
Computation runs in IEEE-754 double precision at full internal precision; rounding to two decimal places occurs strictly at the display layer, so no cumulative drift enters the result. All monetary outputs use accounting presentation — grouped thousands, two decimals, negatives in parentheses — so figures can be transcribed directly into a model or working paper. Division-by-zero and out-of-domain inputs return an em-dash rather than a misleading number.
This engine was reconciled against an independent reference implementation and hand-verified for the worked example above before release. Our full five-stage review process is published on the About Us page.
Disclaimer. This calculator is provided for informational and modelling purposes only and does not constitute financial, tax, legal, medical, or engineering advice. Verify all figures with a qualified professional before acting on them.
Asphalt Calculator — 10 Expert FAQs
10 analyst-written answers to the questions practitioners actually ask — optimised for voice and answer-engine retrieval.
How many tons of asphalt do I need for a driveway?
Square feet × depth in feet × 145 ÷ 2,000. A 60 × 20 drive at 3 in is 21.75 tons exactly. Add 5% for waste and round to whole tons the plant will ticket.
What density should I use for the tonnage math?
145 lb/ft³ — the compacted ordering average for dense-graded hot mix. Real placed density runs 142-148, which moves tonnage by about 2%. Quoted figures above 150 are lab maximums and will under-order the job.
How much does hot mix asphalt cost in 2026?
Delivered, roughly $85-175 a ton nationally, averaging near $110-120 — it tracks crude oil, so quotes move. Installed driveways land at $7-13 per square foot with base and labor; overlays $3-7.
How thick should an asphalt driveway be?
2-3 inches compacted for cars over a prepared stone base; 4 if trucks or RVs cross it. Parking lots run 3-6 inches, roads more. The base is a separate material line — usually $18-31 a ton of crushed stone.
What is a lift, and why two?
A lift is one paver pass, rolled to density before the next. Past about 6 inches a single lift skins: the roller densifies the top while the bottom stays soft. Thick sections are placed in two lifts — the math for each is this page’s, twice.
Hot mix or cold patch?
Hot mix for anything permanent — it compacts into one mass and lasts 15-20 years. Cold patch (about 140 lb/ft³) is a pocket-able repair mix for potholes: it firms up but never fully cures, a 1-3 year answer.
Is recycled asphalt (RAP) worth it?
For base layers and rural drives, often yes — RAP runs roughly $40-80 a ton and compacts hard. It lacks the fresh-binder durability for a wearing course. Enter its density (about 140) and quote; the tonnage math is identical.
Why does the plant round my order up?
Asphalt is batched and ticketed by the ton as weighed, and minimum loads apply. The scale reads what the truck weighs — order the page’s whole-ton figure and expect the ticket to land within a fraction of it.
How long before I can drive on new asphalt?
Usually 24-72 hours for cars in mild weather; full cure takes months, and heavy vehicles are best kept off for a week or more in heat. Fresh mix also softens in extreme heat for its first seasons.
Does this include the stone base?
No — this page prices hot mix only. The compacted crushed-stone base under it is a gravel-page calculation at $18-31 a ton placed, and it is the layer that decides whether the asphalt above lasts its 15-20 years.