Concrete for Driveway Calculation
Quick Answer
A typical single-car driveway section (20 ft long × 10 ft wide × 4 inches thick) requires approximately 2.5 cubic yards of concrete. Always add 10% for waste, bringing the order to 2.75 cubic yards.
Detailed Explanation
Driveways require special consideration compared to standard patios or walkways because they must support the weight of vehicles. The standard thickness for a passenger car driveway is 4 inches, but if you plan to park heavy trucks or RVs, you should increase the thickness to 5 or 6 inches.
Step-by-Step Math Breakdown
1. Convert thickness to feet: 4 ÷ 12 = 0.333 feet
2. Calculate cubic feet: 20 × 10 × 0.333 = 66.6 cubic feet
3. Convert to cubic yards: 66.6 ÷ 27 = 2.47 cubic yards
Materials Note
For driveways, the concrete mix design is just as important as the volume. You should specify a mix with a compressive strength of at least 3,000 to 4,000 PSI. In colder climates subject to freeze-thaw cycles, ensure you order air-entrained concrete to prevent surface scaling and cracking.