How Many Tons of Asphalt for a 20 by 20 Driveway?

A twenty-by-twenty square is 400 square feet, often an apron rather than a long lane. Plan about 4.8 tons at two inches and about 7.3 tons at three inches. The plant ticket is the real weight. A flare beyond the square is extra.

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A square apron is still just area

The square apron contains 400 square feet, which is 20 multiplied by 20. The shape is square, and the formula does not care. At two inches, 400 times 2 times 145 divided by 24,000 equals 116,000 divided by 24,000, which is 4.833, about 4.8 tons. At three inches, 400 times 3 times 145 divided by 24,000 equals 174,000 divided by 24,000, which is 7.25, about 7.3 tons. One inch on this square is 400 times 145 divided by 24,000, about 2.4 tons. Double it for two inches and triple it for three, then round. People trust a square because it looks simple, then pave a neck out to the street that was never in the 400. These tons are planning estimates at 145 pounds per cubic foot. The plant ticket is the real weight.

The neck and the flare are the usual miss

A garage apron of twenty by twenty often connects to a narrower lane or widens at the curb. Measure that piece separately. A ten-foot-long flare from 20 feet down to 12 feet has an average width of 16 and an area of 160 square feet, about 2.9 tons at three inches by itself. Add it to the 7.3 rather than hoping the square was conservative. Edges on a square pad are a smaller share of the area than on a long twelve-foot lane, so a paver on an open apron can land closer to the formula. Hand work at the garage lip can still run thick. Five percent of 7.3 is about 0.4 ton, useful for minor variation and useless if the neck was omitted.

Thickness is a choice you write down

About 4.8 tons and about 7.3 tons are not two prices and not two code options. They are the same 400 square feet at two different compacted depths. Pick the depth the vehicles and the base support, then order that line. Stone under the asphalt is extra, often planned near 1.4 tons per cubic yard, with the quarry ticket as the real stone weight. If the plant will not batch a small load near 4.8 tons, ask before you assume the formula is the delivery. After paving, measure the square you built. If it grew to 22 by 22, the area is 484 square feet and the three-inch planning tons rise to 484 times 3 times 145 divided by 24,000, about 8.8 tons.

A practical sequence

Multiply 20 by 20 to get 400 square feet.
Plan about 4.8 tons at two inches or about 7.3 tons at three inches.
Add the lane or flare that connects the square to the street.
Hold the tons as a planning estimate and check them against the plant ticket.

The mistake to skip

Ordering only the twenty-by-twenty square and paving the connecting lane from the leftover.

Questions people ask

How many tons is a 20 by 20 apron at three inches?

About 7.3 tons. The area is 400 square feet, and 400 times 3 times 145 divided by 24,000 equals 7.25. About 4.8 tons is the two-inch figure. Both are planning estimates. The plant ticket is the real weight, and any connecting flare is additional area.

Is a square cheaper to estimate than a long drive?

The formula is the same. Four hundred square feet at a stated thickness converts like any other area. What changes is waste and hand work, which depend on edges and access, not on the fact that the sides match. This page does not set a price.

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