Base quantities

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Main article: International System of Units

See also: SI base unit

A base quantity is a type of quantity defined as something that is based on unchanging values in the universe, when base quantity is mentioned, it usually means SI base unit, which is the base units of our universe as defined by the SI corporation and is used world-wide as the default units of measurement , below is a list of all the SI base units, for more unit's in the si system, see list of physical quantities.

Name	Symbol	Definition
Second	s	A unit used to measure time
Metre	m	A unit used to measure a the distance between two points, also called a meter in american english
Kilogram	kg	A unit used to measure the mass of object but can also be used as a unit of weight, when base quantity is mentioned, it usually means SI base unit, which is the base units of our universe as defined by the SI corporation and is used world-wide as the default units of measurement , below is a list of all the SI base units, for more unit's in the si system, see list of physical quantities. Name Symbol Definition Second s A unit used to measure time Metre m A unit used to measure a the distance between two points, also called a meter in american english Kilogram kg A unit used to measure the mass of object but can also be used as a unit of weight, when base quantity is mentioned, it usually means SI base unit, which is the base units of our universe as defined by the SI corporation and is used world-wide as the default units of measurement , below is a list of all the SI base units, for more unit's in the si system, see list of physical quantities.

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