Concrete Calculator
Calculate the amount of concrete needed for your project. Determine cubic yards, number of bags, and total cost for slabs, footings, columns, and more.
Step 1: Project Dimensions
Standard Thickness Guidelines
Driveways: 4-6 inches, Patios: 4 inches, Sidewalks: 4 inches, Foundations: 8-12 inches. Thicker concrete provides more strength but costs more.
Step 2: Materials & Costs
About Waste Factor
Add 5-10% extra for spillage, over-excavation, and uneven subgrade. For complex shapes or inexperienced workers, use 15-20% waste factor.
Concrete Calculation Results
Total Concrete Needed
Project Type Comparison
| Project Type | Typical Thickness | Concrete Needed | Estimated Cost |
|---|
Cost Breakdown
Concrete Calculation Formula
Volume (cubic yards) = Length × Width × (Thickness/12) ÷ 27
To calculate concrete needed: Multiply length (ft) by width (ft) by thickness (in/12 to convert to feet), divide by 27 to get cubic yards. Add waste factor (typically 10%).
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