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About the Concrete Calculator
This calculator estimates concrete volume and material quantities for slabs, footings, columns, and other pours. Enter your project dimensions to get the total volume in cubic yards or cubic meters, along with the cement, sand, and gravel amounts for your chosen mix.
For rectangular shapes it applies the standard volume formula length × width × thickness, and for cylinders it uses π × radius² × height. You supply the dimensions in feet, inches, or meters and pick a mix ratio such as 1:2:4. The calculator converts the volume into component quantities, typically measured in bags of cement and loads of aggregate. Add a small margin for spillage and uneven subgrade before ordering, and consult a structural engineer for major load-bearing work.
- Measure the length, width, and thickness of the pour area.
- Select the shape and enter the dimensions in your preferred units.
- Choose a mix ratio and read the volume and material results.