Q:

# How do you convert cubic meters to kilograms?

A:

Cubic meters are a unit of volume, and kilograms are a unit of mass. Cubic meters can only be converted to kilograms if the density of a substance is known. If density is known, then multiplying the number of cubic meters by the density (kg/m^3) derives the number of kilograms.

## Keep Learning

Credit: CommerceandCultureAgency Stone Getty Images

Density must be measured in kg/m^3 in order to convert the number of cubic meters to kilograms through simple multiplication. A substance with a higher density has more kilograms in a certain number of cubic meters than another substance with a lower density but equal volume.

For example, Engineering Toolbox reports that the density of iron is 7850 kg/m^3. If there are 10 cubic meters of iron, this represents (10 m^3 * 7850 kg/m^3), which equals 78500 kg. Liquid water, on the other hand, has a density of just 1000 kg/m^3 at 4 degrees Celsius. If there are 10 cubic meters of water, this represents a mass of (10 m^3 * 1000 kg/m^3), which equals 10000 kg water, a much smaller mass than that of iron in the same amount of volume.

Sources:

## Related Questions

• A:

A kilogram is a unit of mass and a liter is a unit of volume, so there is no direct rate of conversion. If you know the density of a substance, you can make the conversion from kilograms to liters for that substance.

Filed Under:
• A:

Density is a quality that measures mass per unit volume. Mathematically, density is found by dividing an object's mass by its volume. Another way to think of it is as relative heaviness. The Greek letter rho and the Latin letter D are common scientific abbreviations used to represent density.

Filed Under:
• A:

Chemists use the mole unit because, in chemistry, it is often important to speak in terms of number of atoms or molecules rather than in terms of mass or volume. However, it is difficult and inconvenient to directly speak in absolute number of atoms. The mole also provides an easy base from which to convert to units of mass and back again.