Concrete CalculatorUse these calculators to estimate your requirements, keeping in mind they serve only as an approximate guide Calculator Slabs, Square Footings, or Walls Length (foot) Width (foot) Thickness (inches) Quantity Calculate Hole, Column, or Round Footings Diameter (foot) Depth (inches) Quantity Calculate Circular Slab or Tube Outer Diameter (foot) Inner Diameter (foot) Height (inches) Quantity Calculate