Calculate Concrete Requirements
Select project type and enter dimensions to calculate concrete needed.
Concrete Requirements
Total Concrete Needed
Including waste factor
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Cubic Yards
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Cubic Meters
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60 lb Bags
0.45 ft³ per bag
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80 lb Bags
0.60 ft³ per bag
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Estimated Cost
Based on local prices
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Ordering Tips
- Order 5-10% extra for waste and spillage
- Concrete trucks typically deliver 8-10 cubic yards
- Schedule delivery for morning to allow full working day
- Have enough help - concrete sets quickly!
Complete Guide to Calculating Concrete Requirements
Accurate concrete calculation is essential for any construction project. Ordering too little means delays and cold joints, while ordering too much wastes money. Our calculator considers all factors including waste and different project types.
Standard Concrete Thickness Guidelines
| Project Type | Minimum Thickness | Recommended Thickness |
|---|---|---|
| Sidewalks & Paths | 3 inches | 4 inches |
| Patios | 3.5 inches | 4 inches |
| Driveways (Passenger) | 4 inches | 5 inches |
| Driveways (Trucks/RVs) | 5 inches | 6 inches |
| Garage Floors | 4 inches | 4-6 inches |
| Footings | 8 inches | 8-12 inches |
Concrete Mix Strength Classes
| Mix Strength | PSI | Common Uses |
|---|---|---|
| Standard | 2,500-3,000 | Patios, sidewalks, non-structural |
| Reinforced | 3,500-4,000 | Driveways, garage floors |
| Structural | 4,000-5,000 | Foundations, footings |
| High Strength | 5,000-6,000+ | Commercial, industrial |
Frequently Asked Questions
How many 80lb bags of concrete make a yard?
One cubic yard equals 27 cubic feet. Since one 80lb bag yields 0.60 cubic feet, you need approximately 45 bags (27 ÷ 0.60 = 45).
How much does a yard of concrete cost?
Costs vary by region but typically range from $125 to $200 per cubic yard delivered. Small loads (less than 4 yards) often have additional fees.