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# kelvin degree (KelvinDegree)

SI TemperatureMeasure. Symbol: K. It is one of the base units in SI (it is also a unit in the ITS system). Kelvin differs from the Celsius scale in that the triple point of water is defined to be 273.16 KelvinDegrees while it is 0 CelsiusDegrees. The magnitudes of intervals in the two scales are the same. By definition the conversion constant is 273.15.

## Ontology

SUMO / UNITS-OF-MEASURE

## Class(es)

 systeme international unit

kelvin degree

## Superclass(es)

 entity

abstract

quantity

physical quantity

constant quantity

temperature measure

kelvin degree

## Coordinate term(s)

ampere  becquerel  candela  celsius degree  coulomb  fahrenheit degree  farad  gram  gray  henry  hertz  joule  lumen  lux  meter  mole  newton  ohm  pascal  radian  rankine degree  second duration  siemens  sievert  steradian  tesla  volt  watt  weber

## Related WordNet synsets

kelvin, K
the basic unit of thermodynamic temperature adopted under the System International d'Unites

## Axioms (2)

If number is an instance of real number, then "number celsius degree(s)" is equal to ""(number-)" kelvin degree(s)".
```(=>
(instance ?NUMBER RealNumber)
(equal
(MeasureFn ?NUMBER CelsiusDegree)
(MeasureFn
(SubtractionFn ?NUMBER 273.15)
KelvinDegree)))```

If number is an instance of real number, then "number rankine degree(s)" is equal to ""number*" kelvin degree(s)".
```(=>
(instance ?NUMBER RealNumber)
(equal
(MeasureFn ?NUMBER RankineDegree)
(MeasureFn
(MultiplicationFn ?NUMBER 1.8)
KelvinDegree)))```