How many tons of asphalt do I need?

Multiply area (ft²) by compacted thickness (ft) to get cubic feet, then by 145 lb/ft³, then divide by 2,000. Shortcut: one ton of hot mix covers about 80 ft² at 2 inches — halve the coverage each time you double the thickness.

How much area does a ton of asphalt cover?

At compacted thickness: 160 ft² at 1 in, 80 ft² at 2 in, 53 ft² at 3 in, 40 ft² at 4 in. The coverage guide has the full table with metric equivalents.

Do I measure loose or compacted thickness?

Plans and this calculator use compacted (after rolling) thickness. Crews spread roughly 25% thicker to compensate — a 3 in compacted lift is laid at about 3¾ in loose. Order from compacted numbers; the paver handles the fluff factor.

Why does asphalt sell by the ton and not by the yard?

Every truck crosses a certified scale at the plant, so weight is exact and auditable; volume changes with temperature and compaction. Tickets, quotes and pay items are all in tons — the tons vs cubic yards guide covers converting between them.

What thickness should I use?

Residential driveways: 3 in total (two lifts) over 6 in of base. Parking lots: 4 in+. Overlays on sound pavement: 1.5–2 in. Highways and truck yards are engineered per layer — see the thickness guide for the full breakdown.

Does the calculator work for cold patch?

Yes — select cold mix in the mix dropdown. Note that bagged cold patch is sold by the 50 lb bag: divide the pound result by 50 for a bag count on pothole repairs.

Asphalt

Asphalt Calculator

Length × width × compacted thickness × density — reported in the tons your plant sells. Four mix densities built in, waste factor included.

145
lb/ft³ compacted hot mix: 80 ft²
covered per ton @ 2 in: 1.96
tons per cubic yard: ~25%
loose-to-compacted fluff

Contents

1.The tonnage formula
2.Worked example: parking pad
3.Mistakes that blow asphalt orders
4.Density quick reference

Quick answer

How much asphalt do I need for a 10×10 area?

A 10×10 ft area at the standard 3-inch compacted depth needs about 1.99 tons of hot mix asphalt with a 10% waste allowance. A 20×20 ft pad at the same depth needs roughly 8 tons.

Rule of thumb:: One ton of hot mix asphalt covers about 53 ft² at 3 in compacted.
Formula:: Tons = Area × depth × 145 lb/ft³ ÷ 2,000 × (1 + waste)

Asphalt by common area size

3 in compacted depth, hot mix asphalt (145 lb/ft³), 10% waste included. Cost uses the $100–150/ton material range from our driveway cost guide — installed price (with labor and base) runs higher.
Area	Tons (hot mix)	Volume (yd³)	Est. material cost
10×10 ft	1.99 tons	1.02 yd³	$199–299
12×12 ft	2.87 tons	1.47 yd³	$287–431
16×20 ft	6.38 tons	3.26 yd³	$638–957
20×20 ft	7.97 tons	4.07 yd³	$797–1,196
24×24 ft	11.48 tons	5.87 yd³	$1,148–1,722

The tonnage formula

Formula

Tons = Area (ft²) × (t ÷ 12) × 145 ÷ 2,000 × (1 + waste)

Area: length × width (ft²)
t: compacted thickness (inches)
145: compacted hot mix density (lb/ft³)
2,000: pounds per US ton

Metric: tonnes = m² × thickness (m) × 2.322. The full derivation is in the how-to-calculate guide.

The one asphalt-specific twist versus a concrete takeoff: the answer converts to weight, because plants batch and bill by the certified scale ticket. Everything upstream — measuring, unit conversion, waste — is the same discipline. If you only need the volume, the volume calculator skips the density step.

Worked example: parking pad

Worked example

A 30 × 18 ft parking pad, 4 in compacted hot mix, machine laid with simple edges.

1
Area
30 × 18 = 540 ft²
2
Volume
540 × (4 ÷ 12) = 180 ft³
3
Weight
180 × 145 = 26,100 lb
4
Tons + 5% waste
26,100 ÷ 2,000 × 1.05 = 13.7 tons

Result: Order 14 tons — one tandem truck plus a small top-up, so ask the plant to load 14 on one truck if legal in your state.

Every line of that example depends on the first one being right. Areas that are not simple rectangles — curved aprons, flares, irregular lots — are handled in the asphalt measurement guide, and if the job is a driveway, the standard driveway dimensions give workable widths and turnaround sizes before you measure anything at all.

Mistakes that blow asphalt orders

A tonnage figure only becomes a budget once it meets a price, and the questions that follow — what a ton should cost, what drives quotes apart, what is negotiable — are answered in the asphalt cost FAQs. To sanity-check the order from the other direction, the asphalt coverage guide states what one ton actually covers at each thickness, which catches an order that is off by a factor before the trucks are booked.

Density quick reference

Tonnage lives and dies by density. Full tables — including millings and binder — in the density chart.

Typical values; the plant's mix design sheet (ASTM D2726) governs on paid work. Compare with concrete in the concrete density chart.
Material	kg/m³	lb/ft³	t/m³
Hot mix asphalt (compacted)145 lb/ft³ — the estimating standard	2,322	145	2.32
Hot mix asphalt (loose, in truck)Fluffs ~20–25% before rolling	1,870	116.7	1.87
Warm mix asphalt (compacted)Same aggregates, lower placing temp	2,300	143.6	2.3
Cold mix / cold patch (compacted)Higher voids than hot mix	2,200	137.3	2.2
Asphalt millings (loose)RAP; compacts to ~1,950	1,650	103	1.65

Frequently asked questions

Asphalt guides

How to Calculate AsphaltArea × depth × density — the full takeoff method.Guide Asphalt Density ChartUnit weights for hot mix, cold mix and millings.Chart Asphalt Coverage GuideWhat one ton covers at every thickness.Guide Asphalt Cost GuidePer-ton and installed pricing, fees included.Guide Asphalt Thickness GuideLift thickness by application, base to surface.Guide Concrete vs AsphaltThe paving decision, both materials side by side.Comparison Asphalt FAQsThe questions every first-time paver asks.FAQ

More asphalt calculators

Asphalt Driveway Calculator Asphalt Weight Calculator Asphalt Cost Calculator Asphalt Volume Calculator

Working in concrete too?

Sources & references

[1]MS-4: The Asphalt Handbook, 7th ed. — Asphalt Institute, 2007
[2]ASTM D2726: Bulk Specific Gravity of Compacted Asphalt Mixtures — ASTM International, 2021
[3]Asphalt Pavement Design Guide (APD-1) — National Asphalt Pavement Association, 2020

Asphalt Calculator

Tons and cubic yards for any paving area. Uses compacted thickness — the thickness after rolling, which is what plans specify.

Paving a driveway?

The driveway calculator adds the gravel base course to the same estimate.

Driveway Calculator