Concrete Slab Calculator

An 80lb bag covers about 0.6 cubic feet (0.022 cubic yards). For a 10x10ft slab at 4 inches thick, you need about 1.23 cubic yards or approximately 56 bags of 80lb concrete. Always add 5-10% for waste.

Sidewalks and patios: 4 inches. Driveways for cars: 4-5 inches. Driveways for trucks: 5-6 inches. Garage floors: 4-6 inches. Commercial floors: 6-8 inches.

Ready-mix concrete costs $125-175 per cubic yard delivered. For small projects under 1 cubic yard, bags may be more economical at $6.50-7.50 per bag.

The Concrete Slab Calculator is an online tool that lets you calculate concrete volume, bags needed, and project cost for slabs and pads. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.

Using the Concrete Slab Calculator is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. Follow the controls on the page. Some functions require sign-in or a paid plan; see Pricing for limits.

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 Slab 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 Slab 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.