Asphalt Calculator
Enter your paved area’s length and width, pick a project type or custom depth, and choose a mix type to see the tons and cubic yards of asphalt you need.
Measure straight across the widest point.
Adjust depth below if needed.
Covers spillage and compaction. 5–10% is normal.
Everything is calculated in your browser. Nothing you type is sent anywhere or stored.
Bags or bulk delivery?
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Coverage & weight
Material profile
For the calculator’s default 40 ft × 12 ft driveway topcoat at 2 inches deep, you’ll need about 3.2 cubic yards, or roughly 6.5 tons of hot mix asphalt including an 8% waste allowance. That’s around 173 bags if you’re patching with cold mix instead of ordering a hot mix truck.
Asphalt needed for common paving project sizes
These estimates use dense-graded hot mix asphalt at 3,915 lb per cubic yard with an 8% waste allowance built in.
| Project | Depth | Cubic yards | Tons |
|---|---|---|---|
| Small parking pad, 240 sq ft | 2 in | 1.60 yd³ | 3.13 tons |
| Single-car driveway, 600 sq ft | 2 in | 4.00 yd³ | 7.83 tons |
| Driveway base course, 480 sq ft | 3 in | 4.80 yd³ | 9.40 tons |
| Double driveway base course, 960 sq ft | 3 in | 9.60 yd³ | 18.79 tons |
| Road paving segment, 1,440 sq ft | 4 in | 19.20 yd³ | 37.58 tons |
Asphalt mix types, weight and use
| Type | Weight per yd³ | Best for | Drainage |
|---|---|---|---|
| Hot mix asphalt (dense-graded) | 3,915 lb | Driveways, roads, parking lots | Impermeable |
| Cold mix asphalt | 3,700 lb | Patching & small repairs | Impermeable |
Figures are for dry material. Wet or freshly delivered material can weigh noticeably more.
How to calculate hot mix asphalt you need
- Measure the area length × width in feet for a rectangular pad, or radius² × π for a circular one.
- Set the compacted depth 2in for a driveway topcoat, 3in for a base course, 4in for road paving.
- Convert to cubic yards multiply area by depth in feet to get cubic feet, then divide by 27.
- Add waste add about 8% for compaction, tack coat overlap, and trimming at the edges.
- Convert to tons multiply cubic yards by the mix’s density (about 3,700-3,950 lb/yd³) and divide by 2,000.
Worked example
Using the calculator’s default 40 ft × 12 ft driveway topcoat at 2 inches deep with hot mix asphalt:
- Area40 ft × 12 ft = 480 sq ft
- Depth in feet2 in ÷ 12 = 0.17 ft
- Volume480 sq ft × 0.17 ft = 80 cu ft
- Plus 8% waste80 × 1.08 = 86.4 cu ft
- Cubic yards86.4 ÷ 27 = 3.2 yd³
- Weight (hot mix asphalt, 3,915 lb/yd³)3.2 × 3,915 = 12,528 lb
- Tons12,528 ÷ 2,000 = 6.26 tons
- Order amountround up to 6.5 tons, or about 173 bags of cold patch at 0.5 cu ft each
Recommended depth by project
| Project | Recommended depth | Notes |
|---|---|---|
| Driveway topcoat | 2 in | Standard residential driveway wearing surface |
| Asphalt base course | 3 in | Structural layer under a topcoat, or a standalone base |
| Road paving | 4 in | Public or heavily trafficked roadway surface |
| Patch / pothole repair | 1.5-2 in | Cold mix for small repairs, compacted in one lift |
| Commercial lot / heavy truck | 4-6 in | Two-course paving for repeated heavy vehicle loads |
Bags or bulk delivery?
Bagged asphalt is cold mix, meant for patching potholes and small repairs at ambient temperature — it isn’t a substitute for hot mix on a full paving job. Hot mix must be delivered by the truckload while still hot and compacted immediately with a roller, so anything beyond a patch is a bulk-order, contractor job.
- Small patchesunder 0.5 ton (about 20 bags) — cold patch bags handle potholes and small repairs well.
- Medium repairs0.5 to 2 tons — still workable with cold mix bags, though it costs more per ton than hot mix.
- Full paving jobsover 2 tons — always order hot mix by the truckload from a paving contractor.
Common mistakes
- Confusing loose and compacted depthhot mix is delivered loose and compacts under the roller, so ordering by the finished compacted depth (as this calculator does) is correct — not the loose truck-bed depth.
- Skipping the base courseasphalt topcoat placed directly on ungraded subgrade will crack and rut — a compacted gravel base is required underneath.
- Paving in cold or wet weatherhot mix compacts poorly and bonds weakly below about 50°F or on a wet surface, shortening the pavement’s life.
- Using cold patch for a full drivewaycold mix is formulated for small repairs at ambient temperature and doesn’t compact or bond as well as hot mix over a large area.
- Ignoring slope and drainageasphalt paved dead flat lets water pond and accelerates freeze-thaw cracking — plan at least a 1-2% slope.
- Underestimating tack coat needsa tack coat between an existing base and new topcoat is what bonds the layers together — skipping it leads to delamination.
What this calculator assumes
Adjust your result if your project differs from these.
- Depth is the compacted (finished) depth, not the loose truck-bed depth.
- Density assumes standard dense-graded hot mix; cold mix runs slightly lighter.
- 8% waste covers compaction, tack overlap, and trimming at edges and joints.
- Prices are for material only; grading, tack coat, and paving labor are separate.
- Subgrade and base course are assumed prepared and compacted before paving.
- Bag coverage assumes 0.5 cu ft cold patch bags for repairs, not full-driveway paving.
Common questions
How much asphalt do I need for a driveway?
For a typical 480 sq ft driveway at a 2in topcoat, you’ll need about 3.2 cubic yards, or roughly 6.5 tons of hot mix asphalt — the calculator’s default example.
What's the difference between hot mix and cold mix asphalt?
Hot mix is heated for placement and compaction and is used for driveways, roads, and lots. Cold mix is pre-mixed for ambient-temperature patching and repairs only.
How thick should a driveway asphalt layer be?
2 inches is standard for a residential driveway topcoat over a compacted base; add a 3-inch base course under it for extra durability.
How many tons are in a cubic yard of asphalt?
About 1.85 to 2 tons, since hot mix asphalt weighs roughly 3,700-3,950 lb per cubic yard depending on the mix design.
Can I lay asphalt myself?
Small patches with cold mix are DIY-friendly, but hot mix paving requires a paving crew with a spreader and roller — it isn’t practical to place and compact by hand.
How long does asphalt take to cure?
It’s driveable within 24-48 hours but continues curing and hardening for 6-12 months, during which it’s more vulnerable to ruts from parked vehicles.
Do I need a base course under asphalt?
Yes, on any subgrade other than existing sound pavement — a compacted gravel base course spreads the load and prevents cracking and rutting.
How much does asphalt cost per ton?
Hot mix typically runs $100-$150 per ton delivered, though prices vary regionally with oil costs and distance from the plant.
What slope should an asphalt driveway have?
Aim for at least a 1-2% slope so water drains off the surface instead of ponding and accelerating cracking.
Can asphalt be poured over old asphalt?
Yes, an overlay is common for resurfacing sound existing pavement, typically 1.5-2 inches thick after a tack coat is applied.
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Project
| Shape | — |
| Dimensions | — |
| Depth | — |
| Area | — |
| Material | — |
| Waste allowance | — |
Volume & weight (incl. waste)
| Cubic yards | — |
| Cubic feet | — |
| Weight | — |
| Tons (rounded up) | — |
Shopping list
| Bulk order | — |
| Bagged alternative (0.5 cu ft) | — |
| Estimated cost | — |
Notes
Estimate generated by materialcalculate.com. Assumes uniform depth and standard dry material densities. Confirm quantities with your supplier before ordering.