Concrete Slab Calculator
Calculate exactly how much concrete you need for your slab project with our comprehensive calculator. Determine concrete volume, number of bags, total cost, and materials required for your construction project.
Step 1: Slab Dimensions
Standard Slab Thickness
Most residential concrete slabs are 10-15 cm thick. Driveways and heavy-load areas may require 15-20 cm. Always consult local building codes for specific requirements.
Step 2: Calculation Parameters
About Waste Factor
The waste factor accounts for spillage, over-excavation, and irregularities. For small projects, 10% is typical. For complex shapes or larger projects, consider 15-20% waste factor.
Concrete Calculation Results
Total Concrete Required
Concrete Mix Type Comparison
| Mix Type | Strength | Bags Needed | Estimated Cost | Best For |
|---|
Materials Breakdown
Concrete Calculation Formula
Volume (m³) = Length × Width × (Thickness/100) × (1 + Waste Factor/100)
To calculate concrete needed: Multiply length by width by thickness (converted to meters), then multiply by waste factor. Bags needed = Volume × 2000 / Bag Weight (kg).
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