Concrete Calculator - Cubic Yards for Your Project
Calculate the exact amount of concrete needed for slabs, driveways, patios, foundations, and more. Get accurate cubic yard estimates with material costs.
Concrete Volume Calculator
Concrete Results
Enter your measurements to see results
Concrete Project Guidelines
Recommended Thickness
- Sidewalks: 4 inches
- Patios: 4-6 inches
- Driveways: 6-8 inches
- Garage Floors: 6 inches
- Foundations: 8+ inches
Concrete Strength
- 2500 PSI: Residential floors
- 3000 PSI: Driveways, patios
- 3500 PSI: Heavy traffic areas
- 4000 PSI: Commercial use
Ordering Tips
- Add 10% extra for waste
- Order slightly more than calculated
- Consider delivery timing
- Have tools ready before delivery
Concrete Calculator FAQ
How much concrete do I need for a 10x10 patio?
For a 10x10 foot patio that's 4 inches thick: 10 × 10 × 0.33 = 33 cubic feet ÷ 27 = 1.22 cubic yards of concrete.
How many bags of concrete equal one cubic yard?
You need approximately 45 bags of 60-pound concrete mix or 34 bags of 80-pound mix to equal one cubic yard.
What's the minimum thickness for a concrete slab?
The minimum thickness is typically 4 inches for residential applications. Thicker slabs (6-8 inches) are needed for driveways and heavy loads.
Should I order ready-mix or bags?
Ready-mix concrete is more convenient and consistent for projects over 1 cubic yard. Bags are better for small repairs or projects under 0.5 cubic yards.