How many square feet does a ton of asphalt cover?

1 ton of standard hot mix asphalt covers about 80 ft2 at 2-inch compacted depth, 53 ft2 at 3-inch, 40 ft2 at 4-inch. The exact formula is: coverage (ft2) = 2,000 / (depth in inches x 12.083). Density variation matters: 1 ton of warm mix at 142 lb/ft3 covers 81 ft2 at 2-inch; 1 ton of recycled millings at 120 lb/ft3 covers 97 ft2 at 2-inch.

How much area does a ton of asphalt cover at 2 inches?

80 ft2 at 2-inch compacted depth for standard 145 lb/ft3 HMA. In other units: 7.43 m2 at 50 mm metric depth; 8.89 yd2 at 2-inch. Add 5-10% waste for residential, 3-5% for highway projects - so 1 ton typically covers 72-76 ft2 of usable installed paving at 2-inch.

How much area does a ton of asphalt cover at 3 inches?

53 ft2 at 3-inch compacted depth for standard 145 lb/ft3 HMA. 3-inch is the standard depth for commercial parking lots and light-duty roads. A small office lot of 5,400 ft2 at 3-inch needs about 102 tons of HMA, or 105 tons after waste allowance.

How much area does a ton of asphalt cover at 4 inches?

40 ft2 at 4-inch compacted depth for standard 145 lb/ft3 HMA. 4-inch is the standard depth for highways, heavy-truck routes and industrial paving. A 1-lane mile of rural road (63,360 ft2) at 4-inch needs about 1,584 tons of HMA, or 1,640 tons after waste allowance.

Why does coverage vary by mix type?

Coverage scales inversely with density. Standard HMA at 145 lb/ft3 covers 80 ft2/ton at 2-inch. Warm mix at 142 lb/ft3 covers 81 ft2. Cold mix at 135 lb/ft3 covers 86 ft2. Recycled millings at 120 lb/ft3 covers 97 ft2. Stone matrix asphalt at 150 lb/ft3 (denser) covers only 77 ft2. The 20-25% spread between hot mix and millings significantly changes how much tonnage you need to order for the same area.

Asphalt Coverage Per Ton 2026: Square Feet by Depth Reference

If you have tonnage on a quote and want to verify the square-footage it’ll actually cover, you’re in the right place. One ton of standard hot mix asphalt covers 80 ft² at 2-inch depth, 53 ft² at 3-inch, 40 ft² at 4-inch. Below: the full reference chart in feet, yards and meters, the formula behind it, density variants for different mix types, and the practical adjustments contractors actually use.

Ethan Walker Senior Asphalt Estimator · 15+ yrs tonnage verification · Reviewed for accuracy Updated May 15, 2026

Coverage per ton: full chart by depth (standard 145 lb/ft³ HMA)

Asphalt coverage per ton at various depths
Depth	Coverage (ft²)	Coverage (yd²)	Coverage (m²)	tons per 1,000 ft²
1 in	160	17.8	14.86	6.25
1.5 in	107	11.9	9.94	9.34
2 in	80	8.89	7.43	12.5
2.5 in	64	7.11	5.95	15.6
3 in	53	5.89	4.92	18.9
3.5 in	46	5.11	4.27	21.7
4 in	40	4.44	3.71	25.0
5 in	32	3.56	2.97	31.3
6 in	27	3.00	2.51	37.0

Quickest mental math: coverage halves every time depth doubles. 2-inch covers 80 ft²; 4-inch covers 40 ft²; 1-inch covers 160 ft². All at standard 145 lb/ft³ HMA.

The formula behind coverage per ton

Coverage in square feet per ton:

Coverage (ft²) = 2,000 / (depth in inches × 12.083)

Where 2,000 = lb per US ton, and 12.083 = lb per ft² per inch of depth (derived from 145 lb/ft³ / 12 in/ft). Worked example for 3-inch depth: 2,000 / (3 × 12.083) = 2,000 / 36.25 = 55.2 ft² (rounded to 53 in industry tables to account for compaction loss).

The inverse formula (tons needed per square foot at a given depth):

Tons per ft² = depth (in) × 0.00604

That’s the same 0.00604 shortcut used in the square feet to tons conversion table. Multiply your area in ft² by depth in inches by 0.00604, get tons.

Coverage varies by mix type: density variants

Standard HMA density is 145 lb/ft³, but real mixes range from 120 (recycled millings) to 150+ (stone matrix asphalt). The coverage difference matters when ordering.

Coverage variation by asphalt mix type at 2-inch depth
Mix type	Density (lb/ft³)	Coverage 2-in (ft²/ton)	Coverage 3-in (ft²/ton)	Notes
Standard HMA	145	80	53	Most residential and commercial
Stone matrix asphalt (SMA)	150	77	52	High-traffic intersections
Warm mix asphalt (WMA)	142	81	54	Lower-temp paving
Open-graded friction course	130	89	59	Surface drainage layer
Cold mix asphalt	135	86	57	Patch repairs, off-season
Recycled asphalt (RAP, compacted)	120	97	65	See millings calculator

If you don’t know your mix density, use 145 lb/ft³. If your spec calls for SMA or open-graded friction course (typical on high-speed highways), pull the density from the project mix design — the standard 145 number could undershoot or overshoot tonnage by 10-15%.

Practical adjustments contractors actually use

Add 5-10% waste for residential and small commercial. So usable coverage drops from 80 to 72-76 ft²/ton at 2-inch.
Add 3-5% waste for highway and large commercial — tighter waste tolerance because of pay-per-ton DOT contracts and tighter trucking schedules.
Round up tonnage to truckload increments. Most plants deliver in 22-25 ton tri-axle loads. A 18-ton calculated need becomes 25 tons ordered (one truck minimum); a 28-ton need becomes 44-50 tons (two trucks).
Loose vs compacted yardage: coverage tables assume compacted. Loose tonnage at the plant is about 5% lower in apparent volume — you don’t need to adjust the tons number, just understand the yardage difference if buying by yard.
Crown and slope adjustment: a crowned road or sloped driveway has slightly more surface area than its flat plan-view dimensions suggest. For slopes under 5%, ignore; over 5%, add 2-3% to tonnage.

For full tonnage calculations on complex shapes, the asphalt tonnage calculator handles rectangles, circles, triangles and multi-section areas with automatic waste allowance.

Worked examples: coverage to tons for common projects

Worked examples of coverage to tons for common projects
Project	Area	Depth	Tons base	+Waste	Tons to order
2-car driveway	800 ft²	2 in	9.7	+7%	10.4
RV pad	525 ft²	3 in	9.5	+7%	10.2
20-stall parking lot	5,400 ft²	3 in	97.9	+5%	103
50-stall retail lot	13,500 ft²	3 in	244.7	+5%	257
1-lane-mile rural road	63,360 ft²	4 in	1,531	+3%	1,577

Asphalt coverage FAQ

Why do some sources say 70 ft² per ton and others say 80?

The variation comes from assumed density and assumed compaction. 80 ft² at 2-inch is the standard for compacted 145 lb/ft³ HMA. Sources that quote 70 ft² are usually using a lower coverage with built-in waste allowance (10%), or assuming a denser SMA mix. For ordering purposes, use 80 ft²/ton as the calculation base and add waste percentage separately — gives a more transparent number than embedding waste in the coverage factor.

How do I calculate coverage in metric units?

1 metric tonne of standard HMA at 50 mm covers about 8.55 m². Formula: coverage (m²) = 1,000 kg / (depth in meters × 2,323 kg/m³). For UK tarmac at 50 mm: 1 tonne covers about 8.5 m². Full metric conversion is in the tarmac calculator.

Does coverage change with temperature?

Not meaningfully for the cured product. Asphalt placed at 285°F shrinks slightly as it cools to ambient, but the mass (and tonnage) is what you’re paying for. The plant ticket weight is what matters, not the in-place volume. Where temperature does matter is compaction quality — HMA placed below 250°F under-compacts, which effectively reduces in-place density and shortens lifespan; that’s a workmanship issue, not a coverage math issue.

How does coverage affect plant ordering vs delivered tonnage?

Plants weigh by truck ticket at the scale. You pay for delivered tonnage exactly — not for coverage. Coverage matters in two places: (1) figuring out how many tons to order before the project, and (2) verifying after-the-fact that the contractor actually placed the tonnage they billed. If a contractor claims 100 tons placed on a 5,300 ft² surface at 3-inch, the math should check out: 5,300 / 53 = 100 tons. If math is way off, audit the truck tickets.

What's the coverage of cold mix vs hot mix?

Cold mix is about 7% lower density (135 vs 145 lb/ft³), so 1 ton of cold mix covers 86 ft² at 2-inch vs 80 ft² for hot mix — effectively 7% more area per ton. However, cold mix is also weaker and shorter-lasting; the coverage advantage doesn’t offset the durability penalty for anything other than temporary patches. See the asphalt patch calculator for cold mix sizing.