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SI unit of thermodynamic temperature (kelvin)*
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The 13th Conférence Générale des Poids et Mesures (CGPM),
considering
- the names "degree Kelvin" and "degree", the symbols "°K" and "deg" and the rules for their use given in Resolution 7 of the 9th CGPM (1948), in Resolution 12 of the 11th CGPM (1960), and the decision taken by the Comité International des Poids et Mesures in 1962 (PV, 30, 27),
- that the unit of thermodynamic temperature and the unit of temperature interval are one and the same unit, which ought to be denoted by a single name and a single symbol,
decides
- the unit of thermodynamic temperature is denoted by the name "kelvin" and its symbol is "K";
- the same name and the same symbol are used to express a temperature interval;
- a temperature interval may also be expressed in degrees Celsius;
- the decisions mentioned in the opening paragraph concerning the name of the unit of thermodynamic temperature, its symbol and the designation of the unit to express an interval or a difference of temperatures are abrogated, but the usages which derive from these decisions remain permissible for the time being.
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The reader should note that the official version of this Resolution is the French text.
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