🏗️ Concrete Calculator
Calculate cubic yards, bag quantities, and ready-mix needs for slabs, patios, and footings.
Enter Dimensions
Concrete Guide
📏 Standard Thicknesses
| Application | Thickness |
|---|---|
| Overlays only | 2-3" |
| Patios, walkways | 4" |
| Driveways (light) | 5" |
| Driveways (standard) | 6" |
| Garage slabs | 6-8" |
| Footings, foundations | 12"+ |
💡 Bag vs Truck Decision
| Volume | Recommendation |
|---|---|
| Under 1 yard | Bags (30kg or 25kg) |
| 1-3 yards | Either - compare costs |
| 3-8 yards | Truck usually better value |
| Over 8 yards | Truck strongly recommended |
⚠️ Important Notes
- Add 5-10% for waste and spills
- Have sufficient help ready
- Check weather (avoid rain/frost)
- Forms must be level and secure
- Concrete sets quickly - be prepared
🧪 Mix Types
| Strength | Use For |
|---|---|
| 3000 PSI | Patios, walkways |
| 3500 PSI | Driveways |
| 4000+ PSI | Heavy duty, commercial |
| Air-entrained | Freeze/thaw areas (Ontario!) |