International System of Quantities

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The International System of Quantities (ISQ) is the system of quantities that includes, for example, the International System of Units.[1] A system of quantities is a set of quantities with a set of non-contradictory equations relating those quantities. The ISQ has a set of seven base quantities: length, mass, time, electric current, thermodynamic temperature, amount of substance and luminous intensity. The International System of Quantities is defined in the international standard ISO/IEC 80000.[2]


  1. ^ International vocabulary of metrology - Basic and general concepts and associated terms (VIM), 3rd edition
  2. ^ S. V. Gupta, Units of Measurement: Past, Present and Future. International System of Units, p. 16, Springer, 2009 ISBN 3642007384.

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