Calculate concrete needed for slabs, columns, and walls. Get cubic yards, number of bags, and cost estimates. Includes waste factor and common project presets.
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Calculate cubic footage (L×W×depth in feet), then divide by 27 to get cubic yards. A 10×10 ft patio at 4 inches thick needs about 1.24 cubic yards.
A cubic yard requires approximately 60 bags of 60-lb concrete mix or 45 bags of 80-lb mix. For large projects, ordering ready-mix by the truck is more economical.
Sidewalks: 4 inches. Patios: 4 inches. Driveways: 4-6 inches. Garage floors: 4-6 inches. Foundation: 8-12 inches.
The Concrete Calculator is a free online tool that lets you calculate concrete volume in cubic yards for slabs, columns, and walls with bag estimates. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.
Yes, the Concrete Calculator is 100% free to use with no limitations. There is no registration required, no daily usage caps, and no hidden fees. You can use it as many times as you need.
The Concrete Calculator uses industry-standard formulas and algorithms to deliver reliable results. While the tool is designed for accuracy, results should be used as estimates and guidance. For critical decisions, always consult a qualified professional.
Yes, the Concrete Calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers. Simply open NexTool in your mobile browser and navigate to the tool — no app download required.
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Calculate concrete needed for slabs, columns, and walls. Get cubic yards, number of bags, and cost estimates. Includes waste factor and common project presets.
NexTool's Concrete Calculator is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.
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| Project | Thickness | PSI Rating |
|---|---|---|
| Sidewalk / Path | 4" | 3,000 |
| Patio / Floor Slab | 4" | 3,500 |
| Driveway (cars) | 4-6" | 4,000 |
| Driveway (heavy vehicles) | 6-8" | 4,500 |
| Foundation / Footing | 6-12" | 4,000+ |
| Retaining Wall | 6-8" | 4,000 |