How the density calculator works
Density is mass divided by volume. Choose which quantity to find, density, mass, or volume, enter the other two, and the tool solves the relationship. It works in grams and cubic centimeters, where one cubic centimeter equals one milliliter, and also reports density in kilograms per cubic meter.
The density formula
Density equals mass divided by volume. Rearranged, mass is density times volume, and volume is mass divided by density. Density tells you how much matter is packed into a given space, which is why a small lead weight feels heavier than a much larger block of foam.
Will it float?
An object floats in a fluid if it is less dense than that fluid. Pure water has a density of about one gram per cubic centimeter, so anything below that floats and anything above sinks. The tool flags whether your result would float or sink in water as a quick intuition check.
Common uses
Density calculations show up in chemistry labs, material identification, shipping and packing, jewelry and metals, and physics homework. Measuring an object mass and its volume, by dimensions or by water displacement, lets you identify a material or verify its purity by comparing to known densities.
Frequently asked questions
How do I calculate density? Divide the mass by the volume; the tool can also solve for mass or volume.
What is the density of water? About 1 gram per cubic centimeter, or 1000 kilograms per cubic meter.
Why does something float? Because it is less dense than the fluid it sits in.