Here is a list of all common temperature units used in various measurement systems:

1. SI (Metric) Units:

• Celsius (°C) – The metric scale where 0°C is the freezing point of water and 100°C is the boiling point.

• Kelvin (K) – The SI base unit of temperature. 0 K is absolute zero (no heat energy), and each Kelvin increment is the same size as a Celsius increment.

2. Imperial and US Customary Units:

• Fahrenheit (°F) – Commonly used in the US and its territories. 32°F is the freezing point of water, and 212°F is the boiling point.

3. Other Temperature Scales (Less Common or Specialized):

• Rankine (°R) – Used primarily in thermodynamics, it is similar to Fahrenheit but starts at absolute zero (0°R).

• Réaumur (°Re or °R) – Historically used in some European countries. 0°Re is the freezing point of water, and 80°Re is the boiling point.

• Delisle (°D) – An older scale, where 0°D is the boiling point of water, and 100°D is the freezing point.

• Newton (°N) – A temperature scale used in some parts of the world, based on the behavior of water as a thermometric substance.

• Liebig (°L) – A less common scale, used for scientific purposes.

• Température Intégrale (°TI) – A temperature scale used by some French chemists.
  
  

4. Specialized Temperature Scales:

• ITS-90 (International Temperature Scale of 1990) – Used for precise temperature measurements in scientific and industrial applications. It defines fixed points of pure substances.

• Celsius Absolute (°CA) – Used for specialized thermodynamic calculations, mainly in scientific contexts.