How Far One Ton of Asphalt Goes at 2 Inches Thick

At two inches and 145 pounds per cubic foot, one ton of compacted hot mix covers about 83 square feet, or about 9.2 square yards. A 20 by 30 foot area is about 7.3 tons before waste. The plant ticket is the real weight.

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Half the area of the one-inch ton

Two inches is twice the one-inch depth, so the same ton covers about half the ground. At 145 pounds per cubic foot, the one-inch planning coverage is about 166 square feet. Half of 166 is 83, which is the two-inch figure people use. In square yards, half of about 18.4 is about 9.2 square yards per ton. You can check it with the full formula. Tons equal length times width times 2 divided by 12, times 145, divided by 2,000. For one ton of area, rearrange that until the area is about 83 square feet. Two inches is a common conversation thickness for a surface course. The coverage number does not by itself mean the driveway is finished. A surface course still needs a sound base or a sound lower lift under it.

A 20 by 30 foot check

A 20 by 30 foot rectangle is 600 square feet. Divide 600 by about 83 and you get about 7.2, which rounds with the precise formula to about 7.3 tons. The precise path is 600 times 2 times 145 divided by 24,000. That is 174,000 divided by 24,000, which is 7.25, stated as about 7.3 tons. Use that rectangle as a sanity check on a sketch, not as a universal driveway. If your drive is 20 by 30 and you add a flare, the flare is extra area and extra tons. This is a planning estimate. The plant ticket is the real weight. Do not turn 7.3 into a price. The plant or the contractor quotes money separately from this coverage math.

What two inches does not include

Two inches of surface mix is not a promise that cars, trucks, or a dumpster can use the pavement without a proper base. The tonnage formula stops at the hot mix. Stone under the mat is a different order, often planned near 1.4 tons per cubic yard of gravel, and the quarry ticket is the real weight for that stone. If a quote lists only two inches, ask what the mix is sitting on. Also ask whether the two inches is the compacted finish or a loose screed setting that will roll down. Order and compare tons at the compacted thickness. Edges placed by rake often finish thicker than two inches, so a narrow drive can beat the 83 square foot rule.

A practical sequence

Use about 83 square feet, or 9.2 square yards, per ton at two inches.
Divide your square footage by 83, or run area times 2 times 145 divided by 24,000.
Add area for flares and thick edges before you freeze the order.
Keep the result a planning estimate and read the real weight on the plant ticket.

The mistake to skip

Treating two inches of surface mix as a complete driveway with no base under it.

Questions people ask

How many tons is 600 square feet at two inches?

About 7.3 tons. The arithmetic is 600 times 2 times 145 divided by 24,000, which equals 7.25 and is stated as about 7.3. That matches a 20 by 30 foot rectangle. It is a planning estimate at 145 pounds per cubic foot. The plant ticket is the real weight, and waste or hand work can raise it.

Is two inches the same coverage in square yards?

About 9.2 square yards per ton. Divide about 83 square feet by 9. A bid in square yards and a sketch in square feet must both assume two inches or the tons will not match. Convert yards to feet with a factor of 9 before you compare.

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