Asphalt Calculator: How Many Tons Do You Need?
Use this free online asphalt calculator to estimate how many tons and cubic yards of hot mix asphalt you need for a driveway, parking lot, road or walkway. Enter the area and compacted thickness, adjust the density if your supplier gave you a different number, and get an order quantity in seconds. Switch to Millings mode and it works as an asphalt millings calculator. The metric option and the optional binder estimate cover the same job as a bitumen calculator.
Estimates only · Default density 145 lb/ft³ · Last updated November 10, 2026
Asphalt Tonnage Calculator
Advanced Options (Density, Truckloads & Binder)▼
9.67 tons exact + 5% waste factor
| Quantity | Exact | With Waste |
|---|---|---|
| US Short Tons | 9.67 | 10.15 |
| Metric Tonnes | 8.77 | 9.21 |
| Pounds (lb) | 19,333 | 20,300 |
| Cubic Yards (yd³) | 4.94 | 5.19 |
| Cubic Feet (ft³) | 133.3 | 140.0 |
| Cubic Meters (m³) | 3.78 | 3.96 |
Show calculation steps▾
- Area = 800.0 sq ft
- Volume = 800.0 × 2.0 in ÷ 12 = 133.3 ft³ (4.94 yd³)
- Weight = 133.3 × 145.0 = 19,333 lb
- Tons = 19,333 ÷ 2,000 = 9.67 tons
- Order = 9.67 × (1 + 5%) = 10.15 tons
Estimate only. Includes asphalt mix only — tack coat, base stone, sealer and labor are not included.
Results are planning estimates. Confirm density, thickness and minimum load size with your asphalt plant or paving contractor before you order.
How Much Does 1 Ton of Asphalt Cover?
One ton of hot mix asphalt covers about 83 square feet at 2 inches thick. Coverage drops as thickness goes up, because every square foot needs more material. The table uses the standard planning density of 145 lb/ft³ and US short tons (2,000 lb).
| Compacted thickness | Coverage per ton | Tons per 1,000 sq ft | Common use (typical, not a rule) |
|---|---|---|---|
| 1 in | ≈ 165.5 sq ft | ≈ 6.04 | Thin overlay or patching |
| 1.5 in | ≈ 110.3 sq ft | ≈ 9.06 | Overlay over sound pavement |
| 2 in | ≈ 82.8 sq ft | ≈ 12.08 | Overlay or light-duty driveway |
| 2.5 in | ≈ 66.2 sq ft | ≈ 15.10 | New driveway surface course |
| 3 in | ≈ 55.2 sq ft | ≈ 18.13 | New driveway or light parking |
| 4 in | ≈ 41.4 sq ft | ≈ 24.17 | Heavier traffic, often placed in lifts |
How to Calculate Asphalt Tonnage (Figuring Asphalt Step by Step)
Figuring asphalt comes down to three numbers: the area you are paving, the compacted thickness, and the density of the mix. Everything else is unit conversion.
The asphalt tonnage formula
- Area (sq ft) = length × width
- Volume (ft³) = area × thickness in inches ÷ 12
- Weight (lb) = volume × density (lb/ft³)
- Tons = weight ÷ 2,000
Combined: Tons = area (sq ft) × thickness (in) × density (lb/ft³) ÷ 24,000. To get cubic yards, divide cubic feet by 27. To get the quantity to order, multiply the tons by 1 plus your waste percentage.
Worked example: 20 ft × 40 ft driveway, 2 in thick
- Area: 20 × 40 = 800 sq ft
- Volume: 800 × 2 ÷ 12 = 133.3 ft³ (4.94 yd³)
- Weight: 133.3 × 145 = 19,333 lb
- Tons: 19,333 ÷ 2,000 = 9.67 tons
- Add 5% waste: 9.67 × 1.05 = 10.15 tons to order
Round up to about 10.5 tons and ask your plant about minimum load sizes.
Asphalt Density and Weight Reference
Hot mix asphalt is usually estimated at 145 lb/ft³ once compacted. That is about 3,915 lb, or 1.96 tons, per cubic yard, and roughly 2.32 metric tonnes per cubic meter. Real mixes vary with aggregate, binder content and compaction, so use your supplier's figure when you have one.
| Material | Typical density (lb/ft³) | Tons per cubic yard | kg/m³ |
|---|---|---|---|
| Dense-graded hot mix (planning default) | 145 | 1.96 | 2,323 |
| Stone matrix asphalt (SMA) and warm mix | 140–145 | 1.89–1.96 | 2,243–2,323 |
| Open-graded / porous asphalt | 115–135 | 1.55–1.82 | 1,842–2,162 |
| Asphalt millings (RAP), compacted | about 110 | about 1.49 | about 1,762 |
A handy shortcut: at 145 lb/ft³, each inch of thickness weighs about 109 lb per square yard, which is the familiar "110 lb per square yard per inch" rule of thumb.
How Thick Should Asphalt Be?
Thickness moves your tonnage more than any other input, so confirm it before you order. These are common planning ranges for compacted surface course, not design rules. Your contractor, engineer or local agency sets the actual specification.
| Project | Typical compacted thickness | Notes |
|---|---|---|
| Residential driveway (new) | 2–3 in | Usually placed over a compacted stone base |
| Overlay / resurfacing | 1.5–2 in | Over existing pavement that is still sound |
| Walkway or bike path | About 2 in | Light loads |
| Parking lot, cars only | 2–3 in | Depends on subgrade and base |
| Heavy or truck traffic | 3–4 in or more | Often placed in more than one lift |
The stone base under the asphalt is a separate material. Use the [Stone Calculator] to estimate it.
Asphalt Millings Calculator (Recycled Asphalt)
Asphalt millings, also called reclaimed asphalt pavement (RAP), are ground-up old asphalt used for driveways, farm lanes and parking pads. Select Millings in the calculator to switch to a lighter default density of 110 lb/ft³, about 1.49 tons per cubic yard. Many millings driveways are laid roughly 2–4 inches compacted.
Millings weight changes with moisture and gradation, and loose material on a delivery truck weighs less per cubic yard than compacted millings. Suppliers invoice by weight, so if yours quotes tons per cubic yard, enter that figure as a custom density.
Bitumen Calculator: Metric Units and Binder Estimate
People searching for a bitumen calculator usually want one of two things: the weight of asphalt mix in metric units, or the amount of bitumen binder inside that mix. This tool does both.
Switch to Metric to enter meters and millimeters and read the result in tonnes and cubic meters. Turn on Show bitumen (binder) estimate in the advanced options to see roughly how much binder is in your total mix. Typical hot mix contains about 4–6% binder by weight, so the tool starts at 5%. Replace it with the percentage from your mix design.
Asphalt Driveway Cost: From Tons to Dollars
To turn tonnage into a material estimate, enter your supplier's price per ton in the calculator. The price field is optional because prices vary by region, plant, mix type and delivery distance, so this tool does not guess a price for you.
Material cost = tons to order × price per ton. For example, 10.15 tons at $100 per ton is $1,015. (The $100 is an example figure only.)
Asphalt for driveways cost: material vs. installed
Material is only one part of a paved driveway. A contractor's quote for the cost to asphalt a driveway usually also covers excavation, base stone, grading, compaction equipment, trucking, labor and cleanup. That is why an installed price is much higher than tons × price per ton. Get at least three written local quotes and ask what base thickness and asphalt thickness each one includes.
Asphalt overlay cost
An overlay places a new layer, commonly 1.5 to 2 inches, over existing pavement that is still structurally sound. It needs less material than a new driveway and skips the base, so enter the overlay thickness and your area to see the tonnage. Cracks and drainage problems in the old surface usually need repair first, and that work adds to the price.
Pavement Calculator for Driveways, Parking Lots and Paths
- Driveways: measure the length and average width. For L-shaped or flared driveways, use Add section and enter each part separately.
- Parking lots: enter the total paved area, or add sections for stalls, drive aisles and curved corners. Ask your paver whether different areas get different thickness.
- Roads and paths: enter length and width. For long jobs, add your truck capacity in the advanced options to see roughly how many loads you will need.
Tips Before You Order
- Measure twice. Add 5–10% for an uneven base, edges and spillage. The calculator starts at 5%.
- Ask about minimum loads. Plants usually sell by the ton and may have minimum load sizes or charge extra for partial loads.
- Check the weather window. Asphalt is commonly laid when the air temperature is above about 50°F (10°C) and rising. Your contractor will advise.
- Price the extras separately. Tack coat, base stone, sealer and labor are not part of this tonnage.
Frequently Asked Questions
How many tons of asphalt do I need for a driveway?
It depends on the area and thickness. A 20 × 40 ft driveway (800 sq ft) at 2 inches thick needs about 9.7 tons, or about 10.2 tons with 5% waste. At 3 inches thick, the same driveway needs about 14.5 tons before waste.
How much does 1 ton of asphalt cover?
At 145 lb/ft³, one ton covers about 83 square feet at 2 inches thick, about 55 square feet at 3 inches, and about 41 square feet at 4 inches.
How do you figure asphalt tonnage?
Multiply the area in square feet by the thickness in inches and by the density in lb/ft³, then divide by 24,000. For example, 800 × 2 × 145 ÷ 24,000 = 9.67 tons.
How much does a cubic yard of asphalt weigh?
About 3,915 lb, or 1.96 tons, at 145 lb/ft³. Compacted millings are lighter, around 1.5 tons per cubic yard.
Should I add extra for compaction and waste?
The 145 lb/ft³ figure describes compacted asphalt and thickness should be the compacted thickness, so compaction is already in the math. Add 5–10% for an uneven base, edge spread and spillage. The calculator uses 5% by default.
How thick should an asphalt driveway be?
Most new residential driveways use about 2–3 inches of compacted asphalt over a prepared stone base. Heavier vehicles may need more. Confirm with your contractor or local requirements.
How much does it cost to asphalt a driveway?
Material cost is the tons you order times your supplier's price per ton. A contractor's installed price is higher because it also includes excavation, base, grading, equipment, trucking and labor. Compare at least three written quotes.
What is the cost of an asphalt overlay?
It depends on the area, the overlay thickness (commonly 1.5–2 inches), your local price per ton, and any crack or drainage repairs needed first. Enter your area and thickness to get the tonnage, then add your price per ton.
Can I use this as an asphalt millings calculator?
Yes. Select Millings to use a default density of 110 lb/ft³. Because millings weight varies with moisture and gradation, replace it with your supplier's figure when you have one.
Is bitumen the same as asphalt?
Bitumen is the sticky binder. Asphalt is the finished mix of bitumen and aggregate such as stone and sand. In everyday use the two words overlap, which is why this calculator can estimate both the mix and the binder in it.
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About These Estimates
KKCTools calculators use standard unit conversions and commonly used planning densities. Results are estimates for planning and quoting. They are not engineering, structural or pavement design advice. Always confirm quantities, density and thickness with your asphalt supplier or paving contractor. Last updated November 10, 2026.