Enter a density and a volume to find the mass of an object or a quantity of material, in the unit you choose and several others.
Mass = volume × density. The default is copper, which has a density of 8,960 kg/m³.
Typical values near room temperature. Real samples vary with purity, temperature and pressure.
| Material | Density (kg/m³) |
|---|---|
| Air (room temperature) | 1.2 |
| Gasoline | 740 |
| Oak wood | 700 |
| Ice | 917 |
| Water | 1,000 |
| Concrete | 2,400 |
| Aluminum | 2,700 |
| Steel | 7,850 |
| Iron | 7,870 |
| Copper | 8,960 |
| Silver | 10,490 |
| Lead | 11,340 |
| Gold | 19,320 |
Mass is how much matter an object contains, and for a uniform material it equals the volume multiplied by the density. Choose a density with its unit, enter a volume with its unit, and the calculator converts the volume to the unit used by the density, multiplies, and shows the steps. The mass is then shown in several other units, from milligrams to metric tons, pounds, ounces, carats, grains and atomic mass units.
Mass is the amount of matter and stays the same everywhere. Weight is the force of gravity on that mass, and it changes with the pull of gravity. A scale that reads in kilograms or pounds is really measuring weight and converting it to mass for the place where you are. This calculator gives mass.
Density is mass divided by volume, so its unit is a mass unit over a volume unit. In SI the unit is kilograms per cubic meter. Water is about 1,000 kg/m³, which is 1 g/cm³ or 1 kg/L. In the US system, pounds per cubic foot and pounds per gallon are common. The list also includes psi per 1,000 feet, which is a pressure gradient. It is converted to a density by dividing by the standard acceleration of gravity.
The conversion factors use exact definitions, such as 1 pound = 0.45359237 kilograms and 1 US gallon = 3.785411784 liters. Results are shown to about 10 significant digits. The density of a real material depends on its temperature and purity, so treat results as estimates for real objects.
Multiply the density by the volume, using matching units: mass = density × volume. For 2 cubic meters of copper at 8,960 kg/m³, the mass is 17,920 kg.
About 1,000 kilograms per cubic meter, which is 1 gram per cubic centimeter or 1 kilogram per liter, at around 4 °C. At room temperature it is very slightly lower.
Mass is the amount of matter. Weight is the force of gravity on that matter, so it varies with location, while mass does not.
There are 5,000 metric carats in a kilogram, since one carat is 0.2 gram.
It is one twelfth of the mass of a carbon-12 atom, about 1.6605 × 10^-27 kilogram. It is used to describe atoms and molecules.
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