|Worldwide use:||The Celsius scale, which was already being commonly employed in Europe, discharged the Fahrenheit scale in most countries in the later half of the 20th century. However, Fahrenheit is still the official temperature unit of the United States, Cayman Islands and Belize.||Before the Celsius scale, the Fahrenheit scale was popularly used in most countries across the world. Even after the Celsius standard took over the area, the Fahrenheit standard remained the official in the US, Cayman Islands and Belize. And Canada preserved it as its supplementary temperature scale, beside Celsius.|
|< font color="white">Definition:||
When proposed, the standard definition of the Celsius Scale was, ‘A temperature scale between 0º to 100º degrees, where 0º means the melting point of ice, and 100º signifies the boiling point of water’. However, in the modern times, the definition of Celsius is based on the Kelvin Temperature Scale.
Today, the temperature 0 ºC means a temperature 273.15K or Kelvin. Therefore, the boiling point of water 100 ºC levels to 373.15K on the Kelvin scale.
The Celsius scale is not based on any ratio system, and is not an absolute standard (for example: 20 ºC heat does not represent the two times level of atmospheric heat of 10 ºC temperature). The scale is based on an interval system. For instance, the temperature interval between 20 ºC and 30 ºC is same, found between 30 ºC to 40 ºC.
A temperature difference of 1 deg C is the equivalent of a temperature difference 1.8°F.
The Fahrenheit is a thermodynamic temperature measuring scale, on which the freezing point of water is 32 ºF, and the boiling point is 212°F during standard atmospheric pressure and conditions.
It means, the degree interval on the Fahrenheit scale is 1/180, and 1ºF actually means 0.556 ºC on the Celsius scale.
Absolute Zero, -273.15 °C
Melting point of ice, 0 °C (actually -0.0001 °C)
Warm summer's day in a temperate climate, 22 °C
Normal human body temperature, 37 °C
Boiling point of water at 1 atmosphere, 99.9839 °C
Absolute Zero, -459.67°F
Freezing point of water, 32°F
Warm summer's day in a temperate climate, 72°F
Normal human body temperature, 98.6°F
Boiling point of water at 1 atmosphere, 212°F