Celsius
Symbol: °C
Celsius (also historically known as centigrade) is a temperature scale that is named after the Swedish astronomer Anders Celsius (1701-1744), who developed a similar temperature scale two years before his death.
From 1744 until 1954, 0 °C was defined as the freezing point of water and 100 °C was defined as the boiling point of water, both at a pressure of one standard atmosphere.
The unit "degree Celsius" and the Celsius scale are currently defined by two different points: absolute zero, and the triple point of VSMOW (specially prepared water).
By the new definition the melting point of water is 0.002519 °C and the boiling temperature 99.9839 °C.
Kelvin can be transformed into celsius by using the formular:
TCelsius=TKelvin - 273.15.
1°C = 274.15K
1K = -272.15°C