Rankine Degrees Temperature Converter

A degree Celsius is a unit used in this type of scale. Its symbol is °C, and it is specifically used as a unit of temperature (the physical quantity that reveals the level of heat). This scale, also called the Celsius degree, has the freezing point of water as the value 0 and the boiling point of water as the value 100, always at normal pressure.

Fahrenheit is a thermodynamic temperature scale where the freezing point of water is 32 degrees Fahrenheit (°F) and the boiling point is 212 °F (at normal atmospheric pressure). This places the boiling and freezing points of water exactly 180 degrees apart. Therefore, one degree on the Fahrenheit scale is 1/180 of the interval between the freezing and boiling points of water. Absolute zero is defined as -459.67 °F.

The kelvin is the unit of temperature on the scale created by William Thomson in 1848, based on the Celsius degree, with the zero point set at absolute zero (−273.15 °C) and maintaining the same magnitude. William Thomson, later known as Lord Kelvin, introduced the thermodynamic temperature scale at the age of 24, and the unit was named in his honor. It is taken as the temperature unit in the International System of Units and corresponds to one 1/273.16 part of the temperature of the triple point of water. It is represented by the letter "K", and never "ºK". Additionally, its name is not "kelvin degree" but simply "kelvin"; one does not say "19 kelvin degrees" but "19 kelvin" or "19 K".

The Réaumur scale, also known as the "octogesimal division," is a temperature scale where the freezing and boiling points of water are set at 0 and 80 degrees, respectively. The scale is named after René Antoine Ferchault de Réaumur, who proposed something similar in 1730.