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Metric prefix. A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The prefix kilo-, for example, may be added to gram to indicate multiplication by one thousand ...
A unit prefix is a specifier or mnemonic that is prepended to units of measurement to indicate multiples or fractions of the units. Units of various sizes are commonly formed by the use of such prefixes. The prefixes of the metric system, such as kilo and milli, represent multiplication by positive or negative powers of ten.
Here the metric prefix 'kilo-' (symbol 'k') stands for a factor of 1000; thus, 1 km = 1000 m. The current version of the SI provides twenty-four metric prefixes that signify decimal powers ranging from 10 −30 to 10 30, the most recent being adopted in 2022.
The kilogram (kg) is the unit of mass. The ampere (A) is the unit of electric current. The kelvin (K) is the unit of thermodynamic temperature. The mole (mol) is the unit of amount of substance. The candela (cd) is the unit of luminous intensity. The SI also defines 22 derived units and associated symbols:
The metric system is a decimal -based system of measurement. The current international standard for the metric system is the International System of Units (Système international d'unités or SI), in which all units can be expressed in terms of seven base units: the metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and ...
Kilo is a decimal unit prefix in the metric system denoting multiplication by one thousand (10 3 ). It is used in the International System of Units, where it has the symbol k, in lowercase . The prefix kilo is derived from the Greek word χίλιοι ( chilioi ), meaning "thousand". In 19th century English it was sometimes spelled chilio, in ...
Milli (symbol m) is a unit prefix in the metric system denoting a factor of one thousandth (10 −3 ). [ 1] Proposed in 1793, [ 2] and adopted in 1795, the prefix comes from the Latin mille, meaning one thousand (the Latin plural is milia ). Since 1960, the prefix is part of the International System of Units (SI). SI prefixes. v.
Micro ( Greek letter μ, mu, non- italic) is a unit prefix in the metric system denoting a factor of 10 −6 (one millionth ). [1] Confirmed in 1960, the prefix comes from the Greek μικρός ( mikrós ), meaning "small". It is the only SI prefix which uses a character not from the Latin alphabet. In Unicode, the symbol is represented by U+ ...