All Concrete Calculators

All Concrete Calculators

Every calculator on ConcretePlanner, grouped by the job you are doing. Each tool is free, works instantly and shows cubic yards, bag counts and an estimated cost where that makes sense.

Not sure which one you need? Slabs, driveways and patios start with their own tool below. If you already know your yardage and just need bags, go straight to the bags group.

Core calculators

Bags and how many

Which calculator should I use?

For a flat rectangular pour, use the tool named after your project, because the defaults are set for it: 4 inches for patios and slabs, 5 inches for driveways. For a quote check or a plan that already gives cubic yards, use the bag calculator or the bags per yard chart. For round holes, use the post hole calculator.

Frequently asked questions

Are all the calculators free?

Yes. Every tool on this page is free to use, with no sign up and no limit.

Do the calculators include waste?

The project calculators include a 10 percent waste allowance by default, and you can change it in the tool. The chart pages show exact amounts and say so clearly.

Which result should I order from?

Order from the figure that includes waste. Ready mix suppliers think in cubic yards; stores think in bags. Each tool shows both, plus an estimated cost using prices you can edit.

What if my project shape is not listed?

Split odd shapes into rectangles and round parts, calculate each piece, and add the results. The main calculator covers slabs, footings and round holes, which handles most real projects.

Estimates only. Quantities and prices are guides, not quotes. Confirm final amounts with your supplier before you order.