Concrete Calculator
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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How to Use Concrete Calculator
- 1Select shape: slab, column, or wall
- 2Enter dimensions
- 3Set waste factor percentage
- 4View cubic yards and bags needed
Frequently Asked Questions
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 an 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.
The Free plan includes 10 tool uses per day. Some features require an account or a paid plan. Check the controls on the tool page and Pricing for the applicable limits.
The Concrete Calculator returns results based on the inputs and the tool methodology. Check assumptions, units and source dates. Treat projections as estimates. 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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About Concrete Calculator
Calculate concrete needed for slabs, columns, and walls. Get cubic yards, number of bags, and cost estimates. Includes waste factor and common project presets.
Use the controls shown by Concrete Calculator to generate and review your result. Available features and usage limits depend on your plan. Check the tool's instructions and privacy information before submitting data.
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