# Celsius scale vs Fahrenheit scale- Definition, 10 Major Differences, Examples

## 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)

### 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

https://planetcalc.com/494/

http://www.csgnetwork.com/temp2conv.html

https://www.lenntech.com/calculators/temperature/temperature.htm

https://www.translatorscafe.com/unit-converter/en-US/temperature/3-2/degree%20Fahrenheit-degree%20Celsius/

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://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

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