# Concrete Calculator

The Concrete Calculator estimates the volume and weight of concrete necessary to cover a given area. It also estimates the number of bags of concrete necessary based on standard 60 and 80– pound bags of concrete. Purchasing slightly more concrete than the estimated result can reduce the probability of having insufficient concrete.

## Slabs, Square Footings, or Walls

 Length (l) feetinchesyardsmeterscentimeters Width (w) feetinchesyardsmeterscentimeters Thickness or Height (h) feetinchesyardsmeterscentimeters Quantity

## Hole, Column, or Round Footings

 Diameter (d) feetinchesyardsmeterscentimeters Depth or Height (h) feetinchesyardsmeterscentimeters Quantity

## Circular Slab or Tube

 Outer Diameter (d1) feetinchesyardsmeterscentimeters Inner Diameter (d2) feetinchesyardsmeterscentimeters Length or Height (h) feetinchesyardsmeterscentimeters Quantity

## Curb and Gutter Barrier

 Curb Depth feetinchesyardsmeterscentimeters Gutter Width feetinchesyardsmeterscentimeters Curb Height feetinchesyardsmeterscentimeters Flag Thickness feetinchesyardsmeterscentimeters Length feetinchesyardsmeterscentimeters Quantity

## Stairs

 Run feetinchesyardsmeterscentimeters Rise feetinchesyardsmeterscentimeters Width feetinchesyardsmeterscentimeters Platform Depth feetinchesyardsmeterscentimeters Number of Steps

RelatedVolume Calculator

Concrete is a material comprised of a number of coarse aggregates (particulate materials such as sand, gravel, crushed stone, and slag) bonded with cement. Cement is a substance that is used to bind materials, such as aggregate, by adhering to said materials, then hardening over time. While there are many types of cement, Portland cement is the most commonly used cement, and is an ingredient in concrete, mortar, and plasters.

Concrete can be purchased in multiple forms, including in 60 or 80-pound bags, or delivered in large amounts by specialized concrete mixer trucks. Proper mixing is essential for the production of strong, uniform concrete. It involves mixing water, aggregate, cement, and any desired additives. Production of concrete is time-sensitive, and the concrete must be placed before it hardens since it is usually prepared as a viscous fluid. Some concretes are even designed to harden more quickly for applications that require rapid set time. Alternatively, in some factory settings, concrete is mixed into dryer forms to manufacture precast concrete products such as concrete walls.

The process of concrete hardening once it has been placed is called curing, and is a slow process. It typically takes concrete around four weeks to reach over 90% of its final strength, and the strengthening can continue for up to three years. Ensuring that the concrete is damp can increase the strength of the concrete during the early stages of curing. This is achieved through techniques such as spraying concrete slabs with compounds that create a film over the concrete that retains water, as well as ponding, where concrete is submerged in water and wrapped in plastic.