Celsius, Centigrade and Fahrenheit
What is the difference between Celsius, Centigrade and Fahrenheit?
What is Celsius?
- This is the most common temperature scale in the world and the simplest to understand.
- Put simply, 0°C is the freezing point of water and 100°C is the boiling point of water.
- Centigrade is an old fashioned name for Celsius.
- You can abbreviate it to °C.
- The scale is named after Swedish scientist Anders Celsius (1701-1744).
What is Fahrenheit?
- Fahrenheit is still in everyday use in the USA and preferred by older people in the UK.
- In Fahrenheit the freezing point of water is 32°F and the boiling point is 212°F.
- You can abbreviate it to °F.
- The scale is named after its originator Gabriel Fahrenheit (1686-1736).
So what was Centigrade?
- Centigrade is the old fashioned name for Celsius.
- The name Centigrade was derived from the latin - meaning hundred degrees.
- When Anders Celsius created his original scale in 1742 he inexplicably chose 0° for the boiling point and 100° for the freezing point.
- One year later Frenchman Jean Pierre Cristin proposed an inverted version of the scale (freezing point 0°, boiling point 100°). He named it Centigrade.
- In 1948, by international agreement, Cristin's adapted scale became known as Celsius to honour the Swedish Scientist.
What is the difference between them?
- Celsius, Centigrade & Fahrenheit are all temperature scales.
- All thermometer temperatures can be expressed in Celsius or Fahrenheit.
- Both scales have the same value at -40°: -40°C = -40°F
- To convert between Celsius or Fahrenheit you can use the following equations:
°C = °F - 32 x (5/9)
°F = °C / (5/9) + 32