Celsjusza

The Celsjusza scale, commonly known as the Celsius scale in English, is a widely used temperature scale for everyday measurements and scientific work. It is named after Anders Celsius, a Swedish astronomer who proposed the scale in 1742. In Polish usage, the scale is referred to as skala Celsjusza, and temperatures are expressed as stopnie Celsjusza (°C).

Historically, Celsius originally defined his scale with inverted endpoints, placing 0 at the boiling point of water and 100 at the freezing point. After his death, the scale was reversed to the present convention, so that 0 °C corresponds to the freezing point of water and 100 °C to the boiling point at standard atmospheric pressure (1 atm, 101.3 kPa).

In modern definitions, the degree Celsius is tied to the Kelvin scale: 1 °C equals 1 kelvin, and 0 °C equals 273.15 K. The relationship is K = °C + 273.15. The Celsius scale is the standard unit for measuring temperature in most of the world, used in weather forecasts, science, medicine, industry, and daily life, with Fahrenheit remaining in use in a few countries.