Asphalt Calculator

Multiply the area by the compacted thickness to get volume, then by the density to get weight. In feet and inches: area (sq ft) x thickness (in) / 12 × 145 lb per cubic foot / 2,000 gives short tons. A 20 × 40 ft driveway at 3 inches is 14.50 tons before any allowance.

Tons = length (ft) x width (ft) x thickness (in) / 12 x density (lb per cubic foot) / 2,000. With the common 110 pounds per square yard per inch spread rate it becomes square yards x inches x 110 / 2,000. Both give the same answer, since 110 lb per square yard per inch equals about 146.7 lb per cubic foot.

It depends on thickness. One ton covers about 83 sq ft at 2 inches, 55 sq ft at 3 inches and 41 sq ft at 4 inches, using 145 pounds per cubic foot. Thicker asphalt covers less, and the coverage table lists more thicknesses.

About 55.2 square feet, or 6.1 square yards, at 145 pounds per cubic foot. That is a patch roughly 7 feet by 8 feet. The spread rate version agrees: 2,000 pounds divided by 3 inches x 110 pounds per square yard per inch is 6.06 square yards, or 54.5 square feet.

At 2 inches thick you need about 12.08 tons, at 3 inches 18.12 tons and at 4 inches 24.17 tons, using 145 pounds per cubic foot. Add a small allowance for waste if the base is uneven. Enter 1000 as the area in the calculator to see your own figure.

About 24.17 tons at 2 inches, 36.25 tons at 3 inches and 48.33 tons at 4 inches, at 145 pounds per cubic foot. That is twice the 1,000 square foot figures. Use the area option in the calculator if you already know the square footage.

A 20 × 40 foot driveway is 800 square feet. At 3 inches compacted thickness it needs about 14.50 tons, which is 7.41 cubic yards. With a 5 percent allowance it is about 15.23 tons. At 2 inches the figure drops to 9.67 tons.

A 20 × 20 foot area is 400 square feet. At 3 inches thick it takes about 7.25 tons at 145 pounds per cubic foot, or 3.70 cubic yards. At 2 inches it takes 4.83 tons. Multiply by your price per ton for the material cost.

The length alone is not enough, so you need the width. At a 12 foot width the driveway is 3,600 square feet, which takes about 65.25 tons at 3 inches thick and 43.50 tons at 2 inches, at 145 pounds per cubic foot. Enter 300 and your own width in the calculator.

About 0.511 cubic yards, at 145 pounds per cubic foot. Put the other way, one cubic yard of compacted asphalt weighs about 3,915 pounds, or 1.96 tons. Density varies a little with the mix, so use your supplier's figure when you have it.

About 3,915 pounds (1.96 tons) at 145 pounds per cubic foot. The in-place range given for asphalt mixture is roughly 142 to 148 pounds per cubic foot, which makes a cubic yard between 3,834 and 3,996 pounds. Use your supplier's figure when you have one.

About 13.8 cubic feet of compacted asphalt, or 0.51 cubic yards, which is a cube roughly 2.4 feet on each side. Spread 3 inches thick it covers about 55 square feet, a patch roughly 7 by 8 feet, so a single ton goes a surprisingly short way.

Use about 145 pounds per cubic foot when you do not know the mix. In-place asphalt mixture typically falls between 142 and 148 pounds per cubic foot, and one source of guidance suggests 148 for estimating. The calculator lets you change the density, and the density table converts it to pounds per square yard per inch.

It is a typical spread rate for asphalt mixtures: 110 pounds of mix per square yard for each inch of compacted thickness. Some state agencies use a different rate, with Illinois at 112 and Tennessee at 106. It equals about 146.7 pounds per cubic foot, so it matches the 145 to 148 range.

Multiply by 12 and divide by 9. A spread rate of 110 lb per square yard per inch is 110 × 12 / 9 = 146.7 pounds per cubic foot. A square yard is 9 square feet, and one inch is 1/12 of a foot, which is where the 12 and the 9 come from.

That depends on the base, the soil and the loads, so the calculator cannot decide it. One firm rule is the minimum compacted lift: at least 3 times the nominal maximum aggregate size, so a mix with 1/2 inch stone needs at least 1.5 to 2 inches. Ask your paving contractor or local guidance for the design thickness.

The design thickness comes from the base, the traffic and local practice, so confirm it with your contractor. What the calculator needs is the finished (compacted) thickness. Whatever you choose must be at least 3 times the nominal maximum aggregate size of the mix, for example at least 1.5 inches for a mix with 1/2 inch stone.

At least 3 times the nominal maximum aggregate size of the mix, so the stones can align and the layer can reach the required density. For a mix whose largest stone size is 1/2 inch, a compacted lift of at least 1.5 to 2 inches is advised. The lift table shows the common sizes.

In North America they are the same material: asphalt concrete, also called asphalt, blacktop or pavement. It is mineral aggregate bound with bitumen, laid in layers and compacted. Outside North America the same material is often called tarmac. Note that bitumen is the binder, and the word asphalt can mean either.

Hot mix asphalt, or HMA, is asphalt made by heating the bitumen and drying the aggregate before mixing, then placing it while hot. Warm mix uses additives to lower temperatures, and cold mix uses emulsified bitumen. The calculator works for any of them because the quantity depends on volume and density.

Set the screed height at 1.25 times the planned compacted thickness, because the mix compacts as it is rolled. For a 2 inch finished lift the paver lays about 2.5 inches loose. Open-graded mixtures use a smaller roll-down of about 15 percent. The calculator takes the finished thickness, not the loose one.

Enter the compacted (finished) thickness. The density figures, such as 145 pounds per cubic foot, describe compacted asphalt, so they already account for compaction. Entering the loose thickness would overstate the tonnage by roughly a quarter, so use the finished depth you plan to end up with.

Many people add a small allowance for waste, uneven base and trimming, and the calculator has an allowance box for it. A few percent is a common starting point, but the right figure depends on the job and your supplier's minimum load. Ask your supplier, and round up to their load size.

Use the circle option and enter the diameter. The area is 3.1416 × (diameter / 2) squared, so a 40 foot circle is 1,256.6 square feet. At 3 inches thick that is 22.78 tons at 145 pounds per cubic foot.

Split the area into rectangles, circles and triangles, work out each area, add them up, and enter the total in the area option. Measuring to the nearest foot is enough for an estimate. For a large or curved job, a surveyed area is better because small errors add up across the thickness.

Multiply the tons you order by the price per ton, then add delivery or installation if they are charged separately. The calculator multiplies the order tonnage, including your allowance, by the price you enter. For example, 15.23 tons at $100 per ton is about $1,522.50.

The material is about 7.25 tons at 3 inches thick, so the material cost is that times your price per ton, for example $725.00 at $100 per ton. Installed prices include labour, base preparation and equipment, so they are higher. Use the calculator for tons, and get quotes for the rest.

Yes. Choose metric, enter lengths in metres, the depth in centimetres and the density in kilograms per cubic metre. Typical compacted asphalt is about 2,320 kg per cubic metre. For example 100 square metres at 5 cm thick is 5 cubic metres, or about 11.60 tonnes.

Multiply the thickness in metres by the density. At 5 cm thick and 2,320 kg per cubic metre, one square metre needs 0.05 × 2,320 = 116 kg, so one tonne covers about 8.6 square metres. The metric table lists other thicknesses.

A short ton, used in the United States, is 2,000 pounds. A metric tonne is 1,000 kilograms, about 2,204.6 pounds. One short ton is 0.907185 tonnes. The calculator shows both so you can match whichever unit your supplier's ticket uses, which is worth checking before you order.

Yes. The quantity depends only on area, compacted thickness and density, so it applies to driveways, parking lots, roads and patches alike. Enter the total area, or the length and width, and the thickness of the layer you are placing. For several lifts, calculate each separately and add the tons.

Run each layer separately with its own compacted thickness and density, then add the tons. A base course and a surface course can have different thicknesses and mixes. Alternatively, enter the combined thickness if both layers use the same mix, which gives the same total.

Asphalt mix is normally sold by weight, in tons, because its density varies a little with the mix. Aggregates such as sand and topsoil are often sold by the cubic yard. This calculator gives both volume and weight, so you can compare quotes in either unit.

They assume different densities or thicknesses. Some use 145 pounds per cubic foot, others 110 pounds per square yard per inch (146.7), and one metric calculator defaults to 2,400 kg per cubic metre (about 150 pounds per cubic foot). A density of 142 to 148 is typical, so results can differ by a few percent.

It does not size the base, check the thickness against the traffic, or include labour, delivery, tack coat or equipment. It assumes uniform thickness and a flat area. It estimates the tonnage of the asphalt layer from the dimensions and density you enter, which you should confirm with your supplier.

Choose imperial or metric, pick a shape (rectangle, circle or known area), enter the dimensions and the compacted thickness, and check the density. Add an allowance and a price per ton if you want an order quantity and cost. The results show volume, tons, tonnes, coverage and cost.