How Much Concrete for a 20x12 Driveway?
Measuring a 20x12 ft driveway, 5 in thick? The quantity works out to about 4.07 yd³ (cubic yards to order (+10% waste)). Also: cubic yards (exact): 3.70 yd³; cubic feet: 100.0 ft³; 80-lb bags of concrete mix: 184 bags.
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| Cubic yards (exact) | 3.70 yd³ |
|---|---|
| Cubic feet | 100.0 ft³ |
| 80-lb bags of concrete mix | 184 bags |
| 60-lb bags of concrete mix | 245 bags |
How this number is calculated
20 ft × 12 ft × 5 in ÷ 12 = 100.0 cubic feet. Divide by 27 to get 3.70 cubic yards, then add 10% for spillage and uneven ground: 4.07 cubic yards.
Nearby sizes
| Size | Cubic yards to order (+10% waste) |
|---|---|
| a 20x10 ft driveway, 5 in thick | 3.40 yd³ |
| a 20x16 ft driveway, 5 in thick | 5.43 yd³ |
| a 20x20 ft driveway, 5 in thick | 6.79 yd³ |
| a 20x24 ft driveway, 5 in thick | 8.15 yd³ |
Tips
- Ready-mix trucks charge by the yard plus delivery, so ordering a few percent extra is cheap insurance.
- Remember control joints and reinforcement (rebar or wire mesh) in your budget, which are not included here.
- Driveways carrying cars are usually poured 4–6 inches thick; trucks and RVs may need more.
Frequently asked questions
How much concrete do I need for a 20x12 ft driveway, 5 in thick?
Measuring a 20x12 ft driveway, 5 in thick? The quantity works out to about 4.07 yd³ (cubic yards to order (+10% waste)). Also: cubic yards (exact): 3.70 yd³; cubic feet: 100.0 ft³; 80-lb bags of concrete mix: 184 bags.
How is the quantity for a 20x12 ft driveway, 5 in thick calculated?
20 ft × 12 ft × 5 in ÷ 12 = 100.0 cubic feet. Divide by 27 to get 3.70 cubic yards, then add 10% for spillage and uneven ground: 4.07 cubic yards.
How much does concrete for a 20x12 ft driveway, 5 in thick cost?
Using rough planning prices (per cubic yard, ready-mix delivered (small loads can add a short-load fee)), the material for a 20x12 ft driveway, 5 in thick comes to about $570 to $815. Prices vary by region and supplier, so get a local quote.