A derived unit is a unit of measurement obtained by combining the seven fundamental (base) units of the International System of Units (SI) through multiplication, division, or other algebraic relationships. Unlike fundamental units, which measure independent physical quantities (such as length, mass, and time), derived units represent physical quantities that are defined through the relationships between these fundamental quantities. For example, velocity is measured in meters per second (m/s), force in newtons (N), and energy in joules (J), all of which are derived units expressed in terms of base units like meters, kilograms, and seconds. In summary, derived units result from mathematical combinations of fundamental units to measure quantities like speed, force, pressure, and energy that do not have independent base units themselves.
