Last Updated on October 23, 2020 by Sagar Aryal
Celsius scale definition
Celsius scale, or centigrade scale, is a temperature scale that is based on the freezing point of water at 0°C and the boiling point of water at 100°C.
- The scale was introduced by and also named after the Swedish astronomer Anders Celsius in 1742 A.D. This scale uses the symbol °C.
- Initially, the Celsius scale used 0°C for the boiling point of water and 100°C for the melting point of ice, but the scale was later reinverted in the form that is used today.
- In this scale, the lower fixed point is considered 0°C, and the upper fixed point is considered 100°C.
- The region between these two temperatures is divided into 100 equal parts so that each part equals to one degree Celsius (1°C).
- Thus, in the inverted form of the Celsius scale, the freezing point of water is 0°C, and the boiling point of water is 100°C.
- However, a modern Celsius scale has been adopted that is based on the triple point of Vienna Standard Mean ocean water and has improved with the concept of absolute zero.
- According to this, the modern concept of the Celsius scale is not based on the freezing point and boiling point of water, but on the triple point of water.
- After May 2019, the absolute zero, the lowest temperature possible is denoted by 0K or -273.15°C. Before that, however, the temperature of the triple point of water was defined exactly at 273.16 K or 0.01 °C.
- The average human body temperature is 37°C on the Celsius scale.
- The formula for the conversion of Celsius scale into the Fahrenheit scale is given by:
°F = (^{9}/_{5} × °C) + 32
- Celsius scale is commonly used in areas that use metric system units and thus is used for all scientific purposes.
Fahrenheit scale definition
Fahrenheit scale is a temperature scale that is based on the freezing point of water at 32°F and the boiling point of water at 212°F.
- The scale was introduced by and also named after the physicist Daniel Gabriel Fahrenheit in 1720 A.D. This scale uses the symbol °F.
- The lowest defining point in the Fahrenheit scale is the temperature of a solution of brine with an equal amount of ice, water, and salt (ammonium chloride).
- The temperature of the average human body was first established at 96°F, which was later adjusted to 98.6°F.
- In this scale, the lower fixed point is considered 32°F, and the upper fixed point is considered 212°F.
- The region between these two temperatures is divided into 180 equal parts so that each part equals to one Fahrenheit degree (1°F).
- Thus, the freezing point of water is 32°F, and the boiling point of water is 212°F on the Fahrenheit scale.
- The formula for the conversion of degree Fahrenheit to degree Celsius is given by:
°C = (°F – 32) × ^{5}/_{9}
- The absolute zero value in the Fahrenheit scale is -459.67° F.
- Fahrenheit scale is the first standardized temperature scale to be used in the world. It was prevalent in most English-speaking nations until the 1960s.
- The Celsius scale then replaced this scale after 1960 in most countries except the United States.
Key Differences (Celsius Scale vs Fahrenheit Scale)
Basis for Comparison | Celsius Scale | Fahrenheit Scale |
Definition | Celsius scale, or centigrade scale, is a temperature scale that is based on the freezing point of water at 0°C and the boiling point of water at 100°C. | Fahrenheit scale is a temperature scale that is based on the freezing point of water at 32°F and the boiling point of water at 212°F. |
Denoted by | Celsius scale or simply Celsius is abbreviated as Degree C (°C). | Fahrenheit is abbreviated as Degree F (°F). |
Introduced by or Named after | It is named after the astronomer ‘Andres Celsius’. | It is named after the physicist ‘Daniel Gabriel Fahrenheit’. |
The freezing point of water | The freezing point of water or the melting point of ice in the Celsius scale is 0°C. It is the lower fixed point of the scale. | The freezing point of water or the melting point of ice in the Fahrenheit scale is 32°F. It is the lower fixed point of the scale. |
The boiling point of water | The boiling point of water, as described in the Celsius scale, is 100°C. It is the upper fixed point of the scale. | In the Fahrenheit scale, the boiling point of water is 212°F. It is the upper fixed point of the scale. |
Average human body temperature | The average human body temperature, as measured in the Celsius scale, is 37°C. | The average human body temperature in Fahrenheit scale is 98.6°F. |
Absolute zero value | On the Celsius scale, the absolute zero value is set at -273.15°C. | The absolute zero value in the Fahrenheit scale is -459.67°F. |
Divisions | The melting and boiling point of water in the Celsius scale is divided into 100 equal divisions, each division representing 1°C. | The melting and boiling point of water in Fahrenheit scale is divided into 180 equal intervals, each division denoting 1°F. |
Used | The Celsius scale is widely used in almost every part of the globe. | Fahrenheit scale is mostly used in the United States and some of its territories. |
Conversion | It can be converted into Fahrenheit by the formula; °F = (^{9}/_{5} × °C) + 32 | Degree Fahrenheit is easily convertible into Celsius by the formula; °C = (°F – 32) × ^{5}/_{9} |
Convert Online from Celsius scale to Fahrenheit scale
https://www.metric-conversions.org/temperature/celsius-to-fahrenheit.htm
https://www.rapidtables.com/convert/temperature/celsius-to-fahrenheit.html
https://www.almanac.com/content/temperature-conversion
https://www.mathsisfun.com/temperature-conversion.html
https://www.calculatorsoup.com/calculators/conversions/temperature.php
https://power-calculation.com/convert-celsius-fahrenheit-temperature.php
https://www.calculators.org/math/temperature.php
https://www.engineeringtoolbox.com/temperature-d_291.html
https://ostermiller.org/calc/temperature.html
Convert Online from Fahrenheit scale to Celsius scale
https://calculator-converter.com/fahrenheit-to-celsius.htm
https://www.fahrenheittocelsius.com/
https://www.convert-me.com/en/convert/temperature/
https://ncalculators.com/unit-conversion/celsius-fahrenheit-converter.htm
http://www.csgnetwork.com/temp2conv.html
https://www.lenntech.com/calculators/temperature/temperature.htm
https://www.sciencemadesimple.com/temperature_conversions.php
https://www.curiousnotions.com/temperature-converter/
References and Sources
- 3% – https://www.lenntech.com/calculators/temperature/temperature.htm
- 3% – https://en.wikipedia.org/wiki/Celsius
- 3% – https://biodifferences.com/difference-between-celsius-and-fahrenheit.html
- 2% – https://en.wikipedia.org/wiki/Scale_of_temperature
- 2% – http://www.jspayne.com/php/SummaryGet.php?FindGo=Fahrenheit
- 1% – https://www.nextgurukul.in/wiki/concept/icse/class-7/physics/heat/temperature-and-its-measurement/3959265
- 1% – https://www.britannica.com/technology/Celsius-temperature-scale
- 1% – https://www.britannica.com/science/Fahrenheit-temperature-scale
- 1% – https://www.answers.com/Q/What_is_used_in_the_U.S_Celsius_or_Fahrenheit
- 1% – https://www.answers.com/Q/On_which_temperature_scale_is_100_degrees_the_boiling_point_of_water
- 1% – https://study.com/academy/lesson/what-is-centigrade-definition-conversion.html
- 1% – https://kids.britannica.com/students/article/heat/274809
- 1% – https://didyouknow.org/celsius/
- 1% – http://www.saburchill.com/physics/chapters/0097.html
- 1% – http://abyss.uoregon.edu/~js/glossary/temperature_scale.html
- <1% – https://www.scribd.com/document/381249252/general-science-pdf
- <1% – https://hypertextbook.com/facts/1997/LenaWong.shtml
Final equation for Farenheit conversion is incorrect. It should be (F-32)/1.8 not +1.8
Hi Michael,
Thank you so much for the correction. We have updated the formula.
Thanks,
Sagar