How Much Concrete for a 12x80 Driveway?
A 12 by 80 foot driveway is 960 square feet. How much concrete for a 12x80 driveway at the common 5-inch thickness: about 14.81 cubic yards. Most people order 16.50 yards to cover waste and an uneven base.
Concrete calculator →The math for a 12x80 driveway
- Area: 12 ft × 80 ft = 960 sq ft.
- Thickness in feet: 5 in ÷ 12 = 0.417 ft.
- Volume: 960 × 0.417 = 400.0 cubic feet.
- Cubic yards: 400.0 ÷ 27 = 14.81 yd³.
- With 10% extra: 16.30 yd³.
The concrete calculator runs the same steps for any size and thickness.
Related: How Much Gravel for a 12x80 Driveway?
Concrete for a 12x80 driveway by thickness
| Thickness | Cubic feet | Cubic yards | Yards +10% | 80 lb bags | 60 lb bags |
|---|---|---|---|---|---|
| 4 in | 320.0 | 11.85 | 13.04 | 534 | 712 |
| 5 in | 400.0 | 14.81 | 16.30 | 667 | 889 |
| 6 in | 480.0 | 17.78 | 19.56 | 800 | 1,067 |
Bag counts assume about 0.60 cubic feet per 80 lb bag and 0.45 per 60 lb bag, rounded up.
How thick to pour it
Residential concrete driveways are usually 4 to 6 inches thick. Five inches is a sensible minimum if a pickup or delivery truck uses it, and 6 inches if heavier vehicles or an RV park on it. The apron at the street often gets the thicker section.
Related: How Many Tons of Asphalt for a 12x80 Driveway?
Truck or bags?
A cubic yard of concrete is 27 cubic feet and weighs roughly 4,000 pounds. Most ready-mix trucks carry up to about 9 to 10 yards, though local trucks and rules vary. If your total is under a yard or two, bagged mix or a short-load supplier may be cheaper.
Prep before the pour
Prep matters as much as the yardage. Strip sod and soft soil, compact the subgrade, then add a compacted stone base, commonly about 4 inches. A level, firm base also keeps your thickness even, which keeps the yardage close to the math.
Keeping cracks under control
Plan the joints before the pour. Panels close to square crack less than long, narrow ones, and joint spacing around 10 feet is typical for a 4-inch slab. Cut joints with a groover while the concrete is soft or with a saw within the first day.
Questions people ask
How many yards of concrete for a 12x80 driveway at 4 inches?
About 11.85 cubic yards, or 13.04 with 10 percent extra.
How many yards for a 12x80 driveway at 6 inches?
About 17.78 cubic yards.
How many 80 lb bags for a 12x80 driveway?
About 534 bags at 4 inches thick, before any waste allowance.
How many square feet is a 12x80 driveway?
960 square feet.
Should I add extra for waste?
Yes. Adding 5 to 10 percent covers uneven base, spillage and form bulges.
How thick should the base under the slab be?
About 4 inches of compacted gravel is common for residential slabs, more on soft or poorly drained soil.
Related guides
- How Much Area Does a Yard of Concrete Cover?
- How Many Bags of Concrete in a Yard? 40, 60, 80 lb
- Gravel Base Under a Concrete Slab: Depth and Tons
- How Many Yards in a Concrete Truck? Mixer Sizes
- Concrete Short Load Fee: What It Is and How to Cut It
- 60 lb vs 80 lb Concrete Bags: Yield, Count, and Cost
- Rebar vs Wire Mesh in a Slab: Which One to Use
- Cost to Pour a Concrete Slab: Per Square Foot
- How Much Concrete for a 12x50 Driveway?
- How Much Concrete for a 12x60 Driveway?
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