Concrete Calculator Concrete Calculator Estimate the volume and weight of concrete for your project. Slab/Wall Column Circular Slab Curb Stairs Slab / Wall Calculator Length (l) feet inches meters cm Width (w) feet inches meters cm Thickness / Height (h) inches feet meters cm Calculate Clear l w h Column / Round Footing Diameter (d) feet inches meters cm Depth / Height (h) feet inches meters cm Calculate Clear d h Circular Slab / Tube Outer Diameter (d₂) feet inches meters cm Inner Diameter (d₁) feet inches meters cm Length / Height (h) feet inches meters cm Calculate Clear d₂ d₁ h Curb & Gutter Calculator Curb Depth inftmcm Gutter Width inftmcm Curb Height inftmcm Flag Thickness inftmcm Length ftinmcm Calculate Clear Curb H Gutter W Length Stairs Calculator Run inftmcm Rise inftmcm Width inftmcm Number of Steps Platform Depth inftmcm Calculate Clear Run Rise Width