Concrete Calculator
Calculate how much concrete you need for slabs, footings, and columns. Get results in cubic yards, cubic meters, and number of pre-mixed bags with waste factor.
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Common Concrete Depths
| Application | Typical Depth |
|---|---|
| Sidewalk / Walkway | 4" |
| Patio Slab | 4" |
| Driveway (residential) | 4" - 6" |
| Garage Floor | 4" - 6" |
| Footing | 8" - 12" |
| Foundation Wall | 8" - 10" |
How to Use the Concrete Calculator
- Select your unit system: Imperial (ft/in) or Metric (m/cm).
- Enter the length, width, and depth of your project area.
- Adjust the waste factor percentage (default 10%).
- Click Calculate to see volume and bags needed.
Why Add a Waste Factor?
It is always recommended to order 5-15% more concrete than calculated to account for spillage, uneven subgrade, and slight variations in dimensions. A 10% waste factor is standard for most residential projects.
Features
- Imperial and metric unit support
- Results in cubic yards, cubic meters, and cubic feet
- 60lb and 80lb pre-mixed bag estimation
- Adjustable waste factor percentage
- One-click copy result to clipboard
- 100% client-side processing for full privacy
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Disclaimer: This tool is provided as-is for informational and educational purposes only.