Celsíus
The Celsius scale, denoted by °C, is a unit of measurement for temperature. It was developed in 1742 by Swedish astronomer Anders Celsius. The scale is based on two fixed points: the freezing point of water at standard atmospheric pressure, which is set at 0 °C, and the boiling point of water at standard atmospheric pressure, which is set at 100 °C.
Anders Celsius's original scale actually had the boiling point at 0 °C and the freezing point at
The relationship between the Celsius scale and the Kelvin scale, the SI base unit of temperature, is