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 100 °C. However, this was later inverted by Carl Linnaeus and others. The Celsius scale is widely used around the world, particularly in scientific contexts and in most countries for everyday temperature measurement. It is a centigrade scale, meaning it is divided into 100 degrees between the freezing and boiling points of water.

The relationship between the Celsius scale and the Kelvin scale, the SI base unit of temperature, is straightforward. To convert from Celsius to Kelvin, one adds 273.15. To convert from Kelvin to Celsius, one subtracts 273.15. For example, water freezes at 273.15 K and boils at 373.15 K. The Celsius scale is commonly used for weather forecasts, cooking, and many other practical applications.