Concrete Calculators

Estimate concrete volume and ordering quantities for slabs, pads, footings, and cylindrical post holes.

Concrete Calculator

Estimate concrete volume and cubic yards for a rectangular slab or pad.

Estimate concrete volume and bag quantities for cylindrical post holes.

How to Calculate Concrete for a Slab covers the basic volume and cubic-yard calculation. For ordering and cubic-yard planning, see the Concrete Order Quantity guide. For cylindrical holes, see the Post Hole Concrete guide and Fence Post Concrete guide.

Actual concrete orders depend on excavation, subgrade conditions, forms, reinforcement, slopes, waste, truck minimums, and supplier practices.