The Formula Behind This Calculator
Volume (cubic feet) = length (ft) x width (ft) x thickness (in) / 12
Weight (tons) = volume x 145 lb per cu ft / 2,000
Rule of thumb check: 1 square yard at 1 inch thick takes about 110 lb of mix
Compacted hot mix asphalt weighs about 145 pounds per cubic foot, and the industry cross check agrees: a square yard one inch thick is 0.75 cubic feet, which at 145 pounds is about 110 pounds, the number on every paver operator's pocket chart. Enter compacted thickness, not loose thickness: crews lay the mat roughly a quarter thicker loose because the rollers compress it to spec, and the tonnage is bought against the compacted result you are paying for.
Worked Example: A 12 by 40 Driveway at 3 Inches
A standard single width driveway, 12 feet wide by 40 feet long, resurfaced in place at 3 inches compacted over its prepared base.
- Area: 12 x 40 = 480 square feet.
- Volume: 480 x 3 / 12 = 120 cubic feet.
- Weight: 120 x 145 = 17,400 pounds.
- Tonnage: 17,400 / 2,000 = 8.7 tons of hot mix.
- Material budget: 8.7 tons at $90 to $140 = about $783 to $1,218 at the plant.
- Installed budget: 480 square feet at $5 to $9 = $2,400 to $4,320 for the paving work on a sound base.
Notice the distance between the material line and the installed line: trucking at temperature, the paver and rollers, and a crew that can lay 9 tons before it cools are what the difference buys. When you compare quotes, line their stated tonnage up against the 8.7 tons this job truly needs. A 6 ton quote at 3 inches is not a bargain; it is a 2 inch driveway wearing a 3 inch label. Our asphalt driveway cost guide walks through reading a full quote.
A Complete Guide to Asphalt Quantities
Asphalt is the only material on this site you almost certainly will not install yourself, and its calculator exists for a different reason: verification. Tonnage is the unit paving is bought, bid and delivered in, and a homeowner who can compute it independently can read any quote like an inspector. This guide covers the density math, thickness judgment, and the base questions that decide whether the mat you buy is the mat you keep.
Compacted Versus Loose Thickness
Quotes promise compacted thickness because that is the driveway you drive on. The paver lays mix about 25 percent thicker than the target and the rollers bring it down, squeezing out air until the mat reaches density. Density is not a detail: mix compacted to 92 to 96 percent of its maximum density sheds water and resists rutting, while under compacted mix drinks water, oxidizes fast and ravels at the surface. When a quote seems to promise your thickness at two thirds of your tonnage, one of the numbers is fiction, and it is rarely the tonnage they plan to buy. Ask for both figures in writing, then check them here.
The Base Carries the Load
Asphalt is a flexible surface: it spreads loads onto the aggregate base beneath, and the base spreads them onto the soil. That chain means a 3 inch mat over 6 inches of compacted crusher run outperforms 4 inches of mat over dirt in every way that matters by year five. For new work, expect quotes to specify base depth, compaction, and edge support, because unsupported edges are where driveways unravel first. For overlays, the honest question is whether the existing structure deserves a new wearing surface: widespread alligator cracking, rutting and standing water are base confessions, and paving over them rents a new surface for two seasons at full price.
Overlays, Patching and Cold Mix
Not every asphalt number is a new driveway. Overlays at 1.5 to 2 inches compacted use proportionally less tonnage: run this calculator at 2 inches for a fair estimate. Patches and apron repairs are usually priced per visit rather than per ton, because minimums rule small work. Cold patch in 50 pound bags covers about 2.5 square feet at 2 inches per bag and is a legitimate temporary fix for potholes while you plan real work; it is not a paving material and does not pretend otherwise on any honest label. Sealcoating, finally, is maintenance by area, not tonnage: a squeegee applied protective coat every 2 to 3 years, priced around $0.25 to $0.45 per square foot professionally in 2026.
Timing, Temperature and Season
Hot mix must be placed and compacted hot, which makes paving a seasonal trade in cold states: plants shut down in winter, and late season quotes sometimes discount to fill the last weeks. In hot climates the constraint flips; summer demand and afternoon storms drive scheduling. Either way, a contractor who will pave your driveway in marginal weather at a suspicious discount is telling you how the mat will perform. Take the number from this page, take three quotes in the proper season, and let the tonnage column arbitrate.
Before You Sign: Five Questions for Any Paver
One, what compacted thickness are you quoting, in writing? Two, how many tons does that come to on my measured area, and does it match this calculator within a normal overrun? Three, what base work is included: depth, material, compaction, and what happens if the crew finds failed base mid job, at what price? Four, who handles edge support and the tie in at the street apron and garage slab, the two joints where driveways separate first? Five, what is the sealcoating guidance and first year follow up if a soft spot appears? A contractor who answers all five concretely has nothing to hide behind the tonnage. A contractor who answers none of them has given you the most useful information of all, early, while your deposit is still in your pocket. Keep the written answers with the contract; verbal tonnage has a way of compacting further than the mat does.