Concrete Driveway Calculator
Enter the length, width and thickness of your driveway. Add your local price per yard, delivery fees and sales tax to see the material cost.
Last updated November 13, 2026
How much concrete for a driveway?
Driveway volume = length × width × thickness. Because driveways are large, a small change in thickness moves the order by a yard or more.
Example: a 12 ft × 40 ft driveway at 5 inches thick is 12 × 40 × 0.417 = 200 cubic feet, or 7.41 cubic yards. With 10% for waste, order 8.25 yards.
Cubic yards for common driveway sizes
| Driveway size (ft) | Square feet | 4 in thick | 5 in thick | 6 in thick |
|---|---|---|---|---|
| 10 × 20 | 200 | 2.47 | 3.09 | 3.70 |
| 12 × 24 | 288 | 3.56 | 4.44 | 5.33 |
| 12 × 40 | 480 | 5.93 | 7.41 | 8.89 |
| 16 × 40 | 640 | 7.90 | 9.88 | 11.85 |
| 20 × 20 | 400 | 4.94 | 6.17 | 7.41 |
| 20 × 24 | 480 | 5.93 | 7.41 | 8.89 |
| 24 × 24 | 576 | 7.11 | 8.89 | 10.67 |
Figures are exact volumes with no waste added.
What goes into the cost
- Concrete: the price per cubic yard from your supplier, times the yards you order.
- Delivery and short-load fees: many suppliers add a fee for small loads or long distances.
- Sales tax on materials, where it applies.
- Not in this calculator: labor, excavation, gravel base, forms, reinforcement and finishing. Ask contractors to itemize these.
We do not publish price figures here because they change by region and season. Call two local suppliers and enter their quotes.
Aprons and flares
Where the driveway widens at the street or the garage, add the flared section as a second area. An L-shape or an extra rectangle is close enough for ordering.
Frequently asked questions
How much concrete do I need for a driveway?
Multiply length × width × thickness in feet and divide by 27. A 12 ft × 24 ft driveway at 4 inches thick is 3.56 cubic yards. Add 10% for waste.
How thick should a concrete driveway be?
Four inches is common for cars. Five to six inches is used for heavier vehicles such as trucks and RVs. Your local code or supplier can confirm what suits your soil and load.
How much concrete for a 20×20 driveway?
4.94 cubic yards at 4 inches, 6.17 at 5 inches and 7.41 at 6 inches, before waste.
How do I estimate the cost of a concrete driveway?
Enter your supplier’s price per yard, any delivery or short-load fees and your sales tax in the calculator. It covers materials only. Labor, base preparation, forms and finishing are extra.