The Mass Calculator finds an object's mass from its density and volume.
Mass = 8900 kg
| Mass | 8900 kg |
| 8900000 g | |
| 19621.141334 lb | |
| 313938.517434 oz |
Mass = density × volume. It measures the amount of matter in an object and stays the same everywhere, unlike weight, which depends on gravity.
Worked example (defaults): 1 m³ of copper (8,900 kg/m³) has a mass of 8,900 kg.
Mass is measured in kilograms; weight is a force in newtons, equal to mass × gravitational acceleration (9.81 m/s² on Earth). A 10 kg object weighs 98.1 N on Earth but only about 16.2 N on the Moon.
Estimating the mass of building materials, metal stock, liquids in tanks and cargo, and checking load limits.
How do I find density? Look it up for the material or use the Density Calculator.
Is a kilogram a unit of weight? Strictly no, though everyday language treats it so.
What about hollow objects? Use the volume of material only.