# Material Calculator - Volume and Weight Conversion

A calculator for estimating volume, density or size of a body. Pure substances have a certain density, most familiar is the density of water with one gram per cubic centimeter, which is similar to one kilogram per liter. Enter at volume, density and size two of the three values and click *Calculate*.

Example: 3 cubic meters of rock (average rock, rock has a large weight span) have a weight of about 7.5 tons.

Weight is the colloquial term, mass is the physically correct name for something that is given in grams, kilograms or tons.

Density describes how much mass is contained in a certain volume, so it is the ratio of these two quantities, mass divided by volume. The SI unit of density is kilograms per cubic meter, but the more familiar unit is grams per cubic centimeter. The latter is equivalent to kilograms per liter, since a kilogram has 1000 grams and a liter (a cubic decimeter) has 1000 cubic centimeters. One g/cm³ has a thousand times the density of one kg/m³. Densities of various materials can be found in according tables. However, the more diverse a material is and the more variations there are, the less accurate these values from the tables become. For very general terms, such as the stone in the example, the term should be further narrowed down; this could be something like sandstone (approx. 2.5 g/cm³), granite (approx. 2.7 g/cm³) or dolomite (approx. 2.8 g/cm³).

Volume is a three-dimensional value made up of length, width and height. The volume is often determined in cuboid shapes because the calculation is easiest in these cases; the three values of length, width and height are then multiplied together. For all other shapes, the calculation is more complicated or an exact calculation is sometimes not possible at all.