Concrete Slab Calculator
Concrete Slab Calculator is an essential tool for anyone working with concrete. It quickly calculates the volume of concrete needed for:
- Rectangular slabs (driveways, patios)
- Circular slabs (fire pits, round patios)
- Footings/columns (foundation supports, posts)
Why the Concrete Slab Calculator Stands Out
- 🏗 Project-Specific Calculations – Different formulas for slabs vs footings
- 📏 Smart Unit Conversion – Automatically converts inches to feet
- 💡 Professional Recommendations – Includes industry-standard overage advice
Perfect For:
✔ Homeowners planning DIY concrete projects
✔ Contractors needing quick job estimates
✔ Landscapers installing hardscapes
Key Benefits of Concrete Slab Calculator
✅ Three Calculation Modes – Slabs, circles, and footings
✅ Thickness in Inches – How concrete pros measure
✅ Automatic Cubic Yard Conversion – Ready for ordering from suppliers
✅ Mobile-Optimised – Works perfectly on job sites
How to Use: Concrete Slab Calculator
1. Select Your Project Type
Choose between:
- Rectangular Slab (most common)
- Circular Slab (for round features)
- Footing/Column (vertical concrete elements)
2. Enter Your Dimensions
- For Slabs: Length × Width × Thickness (inches)
- For Circles: Diameter × Thickness (inches)
- For Footings: Diameter (inches) × Height (feet)
3. Get Your Concrete Volume
Instant results show:
- Cubic feet (total volume)
- Cubic yards (ordering quantity)
- Pro Tip: The calculator recommends adding 5-10% extra
Why calculate thickness in inches?
Concrete slabs are typically measured in inches (4″, 6″, etc.) while footings use inches for diameter and feet for height.
How many extra Concrete Bags should I order?
We recommend:
5% extra for simple slabs
10% extra for complex shapes or footings
5% extra for simple slabs
10% extra for complex shapes or footings
What’s the difference between slab and footing calculations?
Slabs use thickness (inches) while footings use height (feet) – our calculator handles both correctly.
