Concrete Volume in Cubic Feet for a Slab Calculator
Estimate the amount of concrete needed for your slab project
Rectangular Slab
Circular Slab
L-Shaped Slab
Tips for Concrete Slabs
- Standard residential concrete slabs are typically 4 inches thick
- For driveways and patios that will handle heavier loads, consider 5-6 inches thickness
- For proper drainage, slabs should have a minimum slope of 1/8 inch per foot
- Always order 5-10% more concrete than calculated to account for spillage and variations in subgrade
- Concrete is typically ordered in cubic yards (1 cubic yard = 27 cubic feet)
Concrete Conversion Reference
| Conversion | Value |
|---|---|
| 1 Cubic Yard | 27 Cubic Feet |
| 1 Cubic Meter | 35.3 Cubic Feet |
| 1 80lb Bag of Concrete | ~0.6 Cubic Feet |
| 1 60lb Bag of Concrete | ~0.45 Cubic Feet |
| 1 40lb Bag of Concrete | ~0.3 Cubic Feet |
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