## About concrete calculators

Our concrete calculator can help you determine how much concrete you need, the costs involved, if you require concrete bags or ready mix, a how-to formula, and the waste allowance amount.

## Definition of a concrete calculator

A concrete calculator is an **automated program** used to
**estimate the amount of concrete**, in volume or weight,
**to fill a given area**. Typically in the US concrete is
**sold in pound bags** or by the **cubic yard**.

## How to calculate how much concrete is needed?

- Determine the width, length, and depth of the area you want to concrete
- Multiply width by length (this = Square Footage)
- Convert depth from inches into feet by dividing by 12
- Now multiply the square footage (width x length) by the converted depth (depth inches / 12)
- This is the total cubic feet needed.
- To convert into cubic yards, start by dividing cubic feet by 27

## Concrete equation

((w x l) x (d / 12)) / 27 = cubic yard

w = Width, l = length, d = depth

w = Width, l = length, d = depth

## Example

Mr. Calculate needs a slab of concrete covering 20 feet by 20 feet at 6 inches deep.

((20 x 20) x (6 / 12)) / 27 = 7.407 cubic yards