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Concrete Calculator
Calculate concrete volume, bags needed, and costs for slabs, foundations, driveways, and steps. Professional tool trusted by contractors and builders worldwide.
Project Details
Results
Pro Tips
• Always add 10% waste factor for complex shapes
• Ready-mix is more economical for large projects
• Standard driveway thickness: 4-6 inches
• Foundation footings: 8-12 inches deep
• Consider reinforcement for structural loads
How to Use the Concrete Calculator
Step 1: Select Project Type
Choose the shape that best matches your project:
- Concrete Slab: For driveways, patios, garage floors, sidewalks
- Concrete Steps: For stairs, multi-level steps
- Round Column/Post: For circular footings, posts, columns
- Foundation Footing: For foundation footings, retaining walls
Step 2: Enter Dimensions
Measure and enter your project dimensions accurately. Use consistent units throughout.
Step 3: Set Waste Factor
Include 10-15% waste factor to account for over-excavation, spillage, and variations in thickness.
Step 4: Review Results
The calculator provides volume in cubic yards (standard unit for ready-mix concrete) and bag quantities for smaller projects.