Concrete Calculator
Calculate the volume and weight of concrete needed for your project. Choose from different shapes and get accurate estimates for slabs, columns, stairs, and more.
Slabs, Square Footings, or Walls
Calculate concrete needed for rectangular/square structures
Hole, Column, or Round Footings
Calculate concrete needed for cylindrical structures
Circular Slab or Tube
Calculate concrete needed for circular structures with hollow centers
Curb and Gutter Barrier
Calculate concrete needed for curb and gutter installations
Stairs
Calculate concrete needed for stepped structures
Concrete Requirements
Consider purchasing 5-10% more concrete than calculated to account for waste and ensure you have enough material for your project.
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About Concrete
Concrete is a composite material made from coarse aggregates (sand, gravel, crushed stone, and slag) bonded together with cement. Portland cement is the most commonly used type and serves as the binding agent that hardens over time.
Concrete can be purchased in various forms, including 60 or 80-pound bags for smaller projects, or delivered in bulk by concrete mixer trucks for larger applications. Proper mixing is essential for producing strong, uniform concrete.
The curing process is crucial for concrete strength. It typically takes about four weeks for concrete to reach over 90% of its final strength, with strengthening continuing for up to three years. Keeping concrete damp during early curing stages increases its final strength.