How Much Recycled Concrete Aggregate for a 20x80 Driveway?

A 20 by 80 foot driveway is 1,600 square feet. How much recycled concrete aggregate for a 20x80 driveway depends on depth: at 4 inches it is about 19.75 cubic yards or 25.7 tons. Suppliers usually sell by the ton, so the tonnage is the number to give them.

Volume and tonnage calculator →

The math for a 20x80 driveway

Area: 20 × 80 = 1,600 sq ft.
Depth in feet: 4 ÷ 12 = 0.333 ft.
Cubic feet: 1,600 × 0.333 = 533.3 cu ft.
Cubic yards: ÷ 27 = 19.75 yd³.
Tons: × 1.3 = 25.7 tons.

The volume and tonnage calculator does this for any size.

Recycled concrete aggregate needed by depth

Depth	Cubic yards	Tons (approx.)	Tons +10%
3 in	14.81	19.3	21.2
4 in	19.75	25.7	28.2
6 in	29.63	38.5	42.4

About recycled concrete aggregate

Ask whether the recycled concrete has been screened for rebar and debris. Fresh-crushed concrete can also be alkaline, so keep it away from sensitive plantings and streams. If the yard sells by the cubic yard instead of the ton, use the cubic-yard column directly.

Preparing the driveway

Strip sod and soft topsoil, grade for drainage and compact the subgrade before any stone goes down. Gravel drives last longer with a compacted base layer under the top stone and a slight crown so water runs off. For car and truck traffic, the depths in the table above are a reasonable starting range.

Ordering tips

Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
Delivery size. 28.2 tons may take more than one typical dump truck load; small loads may carry a delivery fee. See how many tons of gravel in a dump truck.
Bulk vs bags. At this size bulk delivery is usually the practical choice.
Where it drops. Have the truck dump as close to the driveway as firm ground allows.

When to choose recycled concrete aggregate

Best suited to:

Driveway and pad bases
Temporary construction entrances
Fill under slabs when compacted in lifts

Less suited to:

Near ponds, streams or sensitive plants, since fresh crush can raise pH
Decorative top layers
Drainage layers, unless the product is clean and screened

Quick reference numbers

Per inch over 100 sq ft: about 0.40 tons of recycled concrete aggregate (0.31 cubic yards).
Per inch over 1,000 sq ft: about 4.0 tons.
Another size for comparison: a 20x25 area at 4 inches takes about 8.0 tons.
Weight used here: about 1.3 tons per cubic yard.

Where estimates go wrong

Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.

Questions people ask

How many tons of recycled concrete aggregate for a 20x80 driveway?

About 25.7 tons at 4 inches deep, or 28.2 tons with 10 percent extra.

How many cubic yards is a 20x80 driveway at 4 inches?

About 19.75 cubic yards.

How much does a cubic yard of recycled concrete aggregate weigh?

Usually around 1.2 to 1.4 tons, depending on stone size, fines and moisture.

How deep should recycled concrete aggregate be for a driveway?

The table above shows 3 to 6 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.

How many square feet is 20x80?

1,600 square feet.

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