Free online weight and mass converter - converts between 70 units of weight and mass, including kilogram [kg], gram [g], milligram [mg], ton (metric) [t], etc. Choose Category The Metric System of Measurements uses the mass units: gram (g), kilogram (kg) and tonne (t). Metric units of mass review (g and kg) This is the currently selected item. Metric units of length review (mm, cm, m, & km) Metric units of volume review (L and mL) U.S. customary and metric units. 1000 g = 1 kg: 1000 kg = 1 tonne: Adding prefixes of the International System of Units (SI) allows to express weight as multiples or fractions of 1 gram: 1 gigatonne (Gt) =1 000 000 000 000 000 g: Converting metric units word problems. Mass is amount of matter an object has. Unit Converter Pro Free Download . By definition, mass is the property of physical bodies, which measures their inertia. Unit of mass. The standard unit of mass is Kilogram (kg) In SI units, following units are accepted: gram (g) and its multiples and submultiples, a tonne (t) or metric ton, electronvolt (eV), the atomic mass unit (u) which is most convenient for denoting the masses of atoms and molecules. For more specific calculations use avoirdupois unit conversions and troy unit conversions. Next lesson. There are multiple units of mass used in the imperial system and the US customary system (and here we get to see an example of where the two systems disagree). List of Mass category units. Mass, in physics, quantitative measure of inertia, a fundamental property of all matter. a. SI Unit of Mass. Mass. The weight of an object, depends on how much force from gravity is acting on it, and the force of gravity is something that can change. How to Convert Units of Weight. The eV/c 2 unit is based on the electron volt (eV), which is normally used as a unit of energy. The associated SI unit of force and weight is the Newton, with 1 kilogram weighing 9.8 Newtons under standard conditions on the Earth's surface. If you insist on using silly imperial units, the unit for mass is the slug (true) . The units for force and mass are defined independently. SI base unit of the mass is kg (kilogram) and not gram (g), this is the only SI unit with a prefix as part of its name and symbol. Common units for mass are the kilogram and the gram. the basic unit of mass is pound-mass (lb m) the unit of force is the pound (lb) alternatively pound-force (lb f). Weight and mass can often be referred to as the same, but there is a difference between them. Mass is measured in units of kilograms. Mass (weight) Units. In the SI system of units, mass is measured in kilograms (kg). Units of Mass/Weight Metric & Imperial. 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