Concrete Calculator
About Concrete Calculations
This calculator helps you estimate how much concrete you'll need for various construction projects. Concrete is typically measured in cubic yards, and this calculator accounts for different shapes and waste factors.
Common Concrete Uses:
- Slabs: Patios, driveways, floors
- Footings: Foundation supports
- Columns: Structural supports
- Stairs: Concrete steps
- Walls: Retaining walls, basements
Concrete Bag Estimates:
| Bag Size | Cubic Feet | Cubic Yards | Covers at 4" Thickness |
|---|---|---|---|
| 40 lb | 0.30 | 0.011 | 0.90 sq ft |
| 60 lb | 0.45 | 0.017 | 1.35 sq ft |
| 80 lb | 0.60 | 0.022 | 1.80 sq ft |
Tips for Ordering Concrete:
- Always order 5-10% more than calculated to account for spillage and uneven subgrades
- Consider weather conditions - hot weather causes faster setting
- Have all tools and help ready before concrete arrives
- For large projects, consider ready-mix concrete delivery