How Many Tons of Asphalt for a 16 by 30 Driveway?

Sixteen by thirty covers 480 square feet, a middle width between one lane and two cars. The planning tons are about 5.8 at two inches and about 8.7 at three inches. The plant ticket is the real weight.

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A middle size with round numbers

Sixteen feet of width over thirty feet of length does not match a one-car slogan or a two-car slogan, so the area has to be calculated on its own. Sixteen times 30 is 480 square feet. At two inches, 480 times 2 times 145 divided by 24,000 equals 139,200 divided by 24,000, which is 5.8 tons exactly in this planning math. At three inches, 480 times 3 times 145 divided by 24,000 equals 208,800 divided by 24,000, which is 8.7 tons. One inch of thickness on this rectangle is 480 times 145 divided by 24,000, or 2.9 tons. That is why the two-inch and three-inch figures are 5.8 and 8.7, two and three times 2.9. They are planning estimates at 145 pounds per cubic foot. The plant ticket is the real weight.

Same area as some other shapes

Four hundred eighty square feet is also a 12 by 40 lane or a 10 by 48 strip. The tons match if the thickness matches, because the formula uses area, not the car story. A 12 by 40 at three inches is also about 8.7 tons. What does not match is the work. A sixteen-foot width may accept a paver more easily than a ten-foot strip, so the yield can sit closer to the formula. A long narrow lane has more edge. Do not move the 8.7 tons onto a shape you have not measured. If your sixteen-foot drive gains a flare, add the trapezoid. Average the end widths, multiply by the flare length, and convert that extra area at the same thickness.

Keep two inches and three inches distinct

The gap between 5.8 and 8.7 is 2.9 tons, a full extra inch, not a rounding error. Ordering the two-inch total for a three-inch mat will short the crew by that amount before waste. Neither number is a legal thickness. Ask what depth is actually being compacted, including whether it is one lift or two that add up to the same finish. Two lifts that total three inches still need about 8.7 tons on 480 square feet. Split them if you want, then add, and do not add the 8.7 again. Gravel base is a different pile, near 1.4 tons per cubic yard as a planning default, confirmed by the quarry ticket.

A practical sequence

Multiply 16 by 30 to get 480 square feet.
Plan 5.8 tons at two inches or 8.7 tons at three inches.
Remember one inch on this area is 2.9 tons, so the depths stay in proportion.
Use the figures as a planning estimate and let the plant ticket be the real weight.

The mistake to skip

Ordering 5.8 tons and then compacting a three-inch mat.

Questions people ask

Why are 5.8 and 8.7 so exact?

Because 480 times 145 divided by 24,000 is 2.9 tons per inch. Two inches is 5.8 and three inches is 8.7 with no further rounding. They are still planning estimates at 145 pounds per cubic foot. A different plant density, or a thicker edge, will move the scale ticket.

Is 480 square feet always 8.7 tons?

Only at three inches and 145 pounds per cubic foot, as a planning estimate. A 12 by 40 area is the same 480 square feet and the same tons at the same depth. Change the thickness and the tons change. The plant ticket is the real weight.

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