Q:

# How many cubic feet is one bag of cement?

A:

An 80-pound bag of concrete makes 0.6 cubic feet. A cubic foot of any material is enough to fill a box that is 1 foot wide, 1 foot tall and 1 foot long.

## Keep Learning

Credit: John Rensten Photodisc Getty Images

In order to determine the volume of concrete required for a project, a worker must determine the surface area and thickness of the concrete. He calculates the surface area by multiplying the length by the width for rectangular projects. The project plans specify the thickness of the concrete. However, before multiplying the surface area in square feet by the thickness in inches, it is necessary to convert all measurements to the same unit. Divide the thickness in inches by 12 to convert it to feet, and multiply by the surface area.

Sources:

## Related Questions

• A:

Concrete mixing ratios are the formula for calculating the correct amount of each ingredient used, including water, cement, sand and aggregate, to produce concrete with the properties desired. A basic concrete ratio is one part cement, two parts sand, and three parts gravel, slowly mixing in water until workable.

Filed Under:
• A:

The basic mix ratio for concrete is one part water, two parts cement and three parts sand. An alternative ratio is one part cement, two parts sand and three parts gravel with enough water added until the mixtures reaches the consistency of thick mud. Lime is also a common additive to the mix.

Filed Under:
• A:

It is not advisable to pour concrete in the rain because it is possible that the rain can wash some of the cement out of the concrete. This can make the surface weak and potentially cause problems in the future, such as surface scaling.