Online Asphalt CalculatorAsphalt Calculator
Figuring asphalt — also called blacktop — for a driveway, parking lot or patch starts here: use this free asphalt tonnage calculator to estimate hot-mix tons from dimensions, a known area, or an advanced multi-area project. The calculation and assumptions stay visible before you order.
Asphalt Project Calculator
Start with one rectangle, or combine multiple shapes and subtract islands, drains or other unpaved areas.
Project size
Enter the paved length and width.
Quick estimate uses a 5% order allowance and the standard 145 lb/ft³ compacted density. Choose to change assumptions, add cost or plan truckloads.
Estimated results
How this result was calculated
- Net area1,000 included − 0 cutouts = 1,000 sq ft
- Compacted volume1,000 sq ft × 3 in = 250 cu ft (9.26 cu yd)
- Net asphalt250 cu ft × 145 lb/ft³ ÷ 2,000 lb/short ton = 18.125 short tons
- Suggested order18.125 × (1 + 5%) = 19.031 short tons
- TruckloadsRound up 19.031 ÷ 18 = 2
Calculations use full precision; rounding is only applied to the displayed results.
Assumptions behind this estimate
- Compacted density: 2323 kg/m3 (145.0 lb/ft3) — planning assumption, verify with your mix supplier.
- Waste allowance: 5.0% on top of net quantity.
- Quantity is for the compacted asphalt layer only; base course and subgrade are not included.
- Planning estimate only. Final pavement design depends on soil, drainage, climate, traffic, local code, and contractor or engineer recommendations.
Before you order
- Confirm the measured area and compacted thickness with the scope of work.
- Replace the planning density, price, and truck capacity with the plant's and hauler's actual figures when available.
- Use the estimate to ask for an itemized quote; it does not evaluate base preparation, drainage, or pavement design.
Read the density guide, thickness guide, or compare contractor quotes.
Visualize pavement section
How to calculate asphalt tonnage
How to calculate asphalt tonnage: this asphalt tonnage calculator converts paved area and compacted thickness into an order quantity using the asphalt tonnage formula below. If you need to figure asphalt tonnage by hand, the same four steps apply — the calculator rounds only the final display:
volume = area × compacted thickness
net weight = volume × compacted density
order weight = net weight × (1 + waste allowance)
Use compacted density, not loose density. The default dense-graded hot mix value is 145 lb/ft³ (about 2,320 kg/m³). Some suppliers use 110 lb/(sq yd·in), equal to 146.67 lb/ft³; the two planning values differ by about 1%.
The default 5% order allowance covers trimming and rake-out. Confirm the density and allowance with the asphalt plant or paving contractor.
What you're actually ordering: hot mix asphalt
Hot mix asphalt (HMA) is normally sold by scale weight in US short tons (2,000 lb). Compacted density is the planning factor that converts the finished pavement volume into estimated weight.
At 145 lb/ft³, one cubic yard of compacted mix weighs about1.96 short tons. Cold mix and bagged patch have different densities; this hot mix asphalt calculator models the hot mix used for paved driveways and parking lots.
Default density values
These are the planning assumptions the asphalt calculator uses, not project specifications. Density varies with aggregate, binder and air voids, so use the plant mix design when available.
| Mix type | Density (lb/ft³) | Notes |
|---|---|---|
| Standard hot mix (dense-graded) | 145 | Common planning value; ~109 LB/(SY·IN). Confirm with your plant. |
| Higher-density planning input | 150 | Editable higher-density planning input. Confirm the mix design with your plant. |
| Lower-density planning input | 135 | Editable lower-density planning input. Confirm the mix design with your plant. |
The asphalt calculator warns you if a custom density falls outside the typical compacted HMA range of 100–170 lb/ft³, which usually means a unit mix-up.
From tons to cost and truckloads
In Advanced project mode, two optional inputs extend this asphalt calculator's tonnage estimate:
- Local price per ton calculates material-only cost. Delivery, tack coat and labor are separate. See the asphalt cost calculator for the full cost breakdown.
- Truck capacity converts the order into whole loads. Confirm legal payload and scheduling with the hauler.
For base layers and residential sizing, use the driveway asphalt calculator, which uses common driveway dimensions and thickness guidance.
A worked example, end to end
Here is what the asphalt calculator computes for a 20 × 30 ft driveway with a 3-inch compacted layer of standard HMA:
thickness = 3 in ÷ 12 = 0.25 ft
volume = 600 × 0.25 = 150 cu ft
net weight = 150 × 145 lb/ft³ = 21,750 lb = 10.9 short tons
order weight = 10.9 × 1.05 = 11.4 short tons
The asphalt calculator result is 11.4 short tons including allowance. At $120 per short ton, material would be $1,368; replace that example price with a local quote.
What this estimate does and does not cover
This asphalt calculator produces a planning estimatefor the compacted asphalt layer. It excludes base preparation, drainage, delivery and labor. Structural design depends on soil, climate, traffic and local code; see the calculation methodology and confirm the final pavement section with a qualified local professional.
Common planning mistakes to avoid
Check these items before relying on an asphalt calculator result:
- Units: 3 inches is 0.25 ft, and one short ton is 2,000 lb (about 0.907 metric tonnes). Use the US/Metric switch rather than mixing systems.
- Density: use compacted density from the mix design; 145 lb/ft³ is only a dense-graded planning default.
- Allowance: 5% suits a simple rectangle, while irregular edges and small placements may require more.
- Scope: a per-ton quote usually covers mix, not delivery, tack coat, base or labor. See the material vs installed cost guide.
Where these numbers come from
This asphalt calculator follows US paving conventions: hot mix is ordered by scale weight, and compacted density converts pavement volume to tonnage. Review the calculation methodology and engineering data sources, then replace defaults with project-specific measurements, density and pricing.
Frequently asked questions
How do I convert square feet to tons of asphalt?
Square feet become tons through thickness and density: multiply the area by the compacted thickness in feet, then by 145 lb/ft³ for standard hot mix, then divide by 2,000. A 600 sq ft driveway at 3 inches works out to about 10.9 net tons. The paving calculator above converts square feet to tons directly — enter a known area and it returns the order quantity including waste allowance.
Is blacktop the same as asphalt?
Yes. "Blacktop" is a common regional name for the same hot-mix asphalt, so this blacktop calculator uses the exact same tonnage math. Whether you call it asphalt or blacktop, enter your dimensions or a known area above to get order tons and truckloads.
How do I figure asphalt for my project?
Figuring asphalt takes four steps: work out the paved area, multiply it by the compacted thickness to get volume, multiply by compacted density (145 lb/ft³ for standard hot mix) to get weight, then add a waste allowance. The asphalt calculator above runs this full calculation — enter dimensions or a known area and this material calculator returns order tons and truckloads.
How many tons of asphalt do I need for a driveway?
A typical 20 × 30 ft driveway with a 3-inch compacted layer needs about 11.4 short tons of hot mix asphalt: 600 sq ft × 0.25 ft × 145 lb/ft³ = 21,750 lb, plus a 5% waste allowance. Enter your exact measurements in the asphalt calculator above for a project-specific number.
How many square feet does a ton of asphalt cover?
Using the asphalt calculator's standard 145 lb/ft³ compacted density, one short ton (2,000 lb) is about 13.8 cu ft. That covers roughly 83 sq ft at 2 inches thick, 55 sq ft at 3 inches, and 41 sq ft at 4 inches. Coverage shrinks as the layer gets thicker.
What density should I use in the calculator?
Use the compacted density from your plant's mix design when you have it. For planning, 145 lb/ft³ is the site's starting value for dense-graded hot mix. The calculator also offers editable 150 and 135 lb/ft³ planning inputs, but neither is a universal value for a named mix type.
What is the difference between 145 lb/ft³ and 110 lb per square yard per inch?
They are two ways of stating the same planning density. 110 lb per square yard per inch equals 146.67 lb/ft³ — about 1% heavier than 145 lb/ft³ — so the two conventions give nearly the same tonnage. Use whichever one your supplier quotes.
How much does asphalt cost per ton?
Material prices vary by region, mix type, and season, and suppliers usually quote per short ton. Enter the quote you received in the asphalt calculator's price field for a material-only cost, then use our asphalt cost calculator to add delivery and installation.
Why is there a waste allowance?
It covers edge trimming, rake-out, and the small amount of mix that doesn't make it into the mat. The asphalt calculator's default 5% suits simple rectangular driveways; irregular shapes or small patches may justify more.
How many tons does a dump truck hold?
Truck capacity depends on the hauler, truck, route and local legal limits. Enter the payload your hauler gives you; the calculator then rounds the estimate up to whole loads for rough scheduling.
Related calculators and guides
Once the asphalt calculator gives you tonnage, go deeper: cost, per-square-foot pricing, driveway sizing, or the planning detail behind each number.