![]() The gram used to be a fundamental unit of mass as part of centimeter-gram-second systems of units up until the widespread adoption of SI, which uses kilograms as the base unit of mass. ![]() History/origin: Originally, a gram was defined as the absolute weight of pure water in a cubic centimeter at the temperature of melting ice (later 4 ☌). Since 2019, the definition of the kilogram is no longer based on the international prototype, and rather is based on Planck's constant, h, along with the new definitions of the second and the meter. The definition of the gram is based on the kilogram, where a gram is one thousandth of a kilogram, the SI base unit of mass. ![]() Gramĭefinition: A gram (symbol: g) is a unit of mass in the International System of Units (SI). Although the "milli" prefix denotes a submultiple with respect to the gram, the kilogram, not the gram, is technically the SI base unit of mass.Ĭurrent use: As a submultiple of an SI base unit, the milligram is widely used in many applications, from everyday use to measure the weight or mass of foods, substances, etc., to widespread use in scientific labs, among other areas. As an SI unit, it uses the "milli" SI prefix to denote that it is a submultiple of the base unit. ![]() History/origin: The milligram is based on the SI unit of weight and mass, the kilogram. Definition: A milligram is a unit of weight and mass that is based on the SI (International System of Units) base unit of mass, the kilogram. ![]()
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