Table of Contents

**What is Celsius scale ?**

The Celsius scale, sometimes known as the centigrade scale, is a temperature scale based on water’s freezing point of 0°C and boiling point of 100°C.

- In 1742 A.D., Swedish astronomer Anders Celsius introduced the scale, which was also named after him.
- The sign for this scale is °C. The Celsius scale originally utilised 0°C for the boiling point of water and 100°C for the melting point of ice, but it was eventually inverted to its current form.
- The lower fixed point is 0°C, and the upper fixed point is 100°C, according to this scale.
- The temperature range between these two points is divided into 100 equal pieces, each of which is one degree Celsius (1°C).
- The freezing point of water is 0°C in the inverted version of the Celsius scale, and the boiling point of water is 100°C.
- However, a current Celsius scale based on the triple point of Vienna Standard Mean ocean water has been established, which has improved with the concept of absolute zero.
- According to this, the present Celsius scale is based on the triple point of water rather than the freezing and boiling points of water.
- After May 2019, the absolute zero temperature, or -273.15°C, will be indicated by 0K or -273.15°C.
- However, before that, the temperature of water’s triple point was precisely defined at 273.16 K or 0.01 °C.
- The average human body temperature is 37 degrees Celsius on the Celsius scale.
- The following is the formula for converting the Celsius scale to the Fahrenheit scale:

+ 32 °F = (9/5 °C)

- The Celsius scale is widely utilised in locations where metric system units are used, and it is consequently used for all scientific purposes.

**What is Fahrenheit scale?**

The Fahrenheit scale is based on the freezing point of water being 32°F and the boiling point of water being 212°F.

- In 1720 A.D., physicist Daniel Gabriel Fahrenheit invented the scale, which was also named after him. The sign for this scale is °F.
- The temperature of a brine solution with an equal amount of ice, water, and salt is the lowest defining point on the Fahrenheit scale (ammonium chloride).
- The average human body temperature was first set at 96°F, but was later raised to 98.6°F.
- The lower fixed point on this scale is 32 degrees Fahrenheit, and the top fixed point is 212 degrees Fahrenheit.
- The area between these two temperatures is divided into 180 equal sections, each one equaling one degree Fahrenheit (1°F).
- On the Fahrenheit scale, water has a freezing point of 32 degrees Fahrenheit and a boiling temperature of 212 degrees Fahrenheit.
- The following is the formula for converting degrees Fahrenheit to degrees Celsius:

5/9 °C = (°F – 32)

- In the Fahrenheit scale, absolute zero is -459.67° F.
- The Fahrenheit scale was the world’s first standardised temperature scale. Until the 1960s, it was common in most English-speaking countries.
- With the exception of the United States, most countries adopted the Celsius scale after 1960.

### Celsius to Fahrenheit Calculator or Formula

**Celsius (C) to Fahrenheit (F) Formula:**

Formula for converting Celsius (C) to Fahrenheit (F):

°F = (9/5 x °C) + 32.

**Celsius (C) to Fahrenheit (F) Example**

Suppose the temperature is 50 degrees Celsius. and you want to know what the figure would be in Fahrenheit

°F = (9/5 x °C) + 32.

Put the values,

°F = (9/5 x 50) + 32.

°F= 122.0

**Fahrenheit to Celsius Calculator or Formula**

Formula for converting Fahrenheit (F) to Celsius (C):

C = 5/9 x (F-32)

**Fahrenheit (F) to Celsius (C) Example**

Suppose the temperature is 80 degrees Fahrenheit and you want to know what the figure would be in Celsius. Use the above three steps:

80 F – 32 = 48

5 x 48 = 240

240 / 9 = 26.7 C

So the temperature in Celsius is 26.7 C.

**Important differences between Celsius scale and Fahrenheit scale **

### Celsius to Fahrenheit chart

Celsius (°C) | Fahrenheit (°F) |

-50 °C | -58.0 °F |

-40 °C | -40.0 °F |

-30 °C | -22.0 °F |

-20 °C | -4.0 °F |

-10 °C | 14.0 °F |

-9 °C | 15.8 °F |

-8 °C | 17.6 °F |

-7 °C | 19.4 °F |

-6 °C | 21.2 °F |

-5 °C | 23.0 °F |

-4 °C | 24.8 °F |

-3 °C | 26.6 °F |

-2 °C | 28.4 °F |

-1 °C | 30.2 °F |

0 °C | 32.0 °F |

1 °C | 33.8 °F |

2 °C | 35.6 °F |

3 °C | 37.4 °F |

4 °C | 39.2 °F |

5 °C | 41.0 °F |

6 °C | 42.8 °F |

7 °C | 44.6 °F |

8 °C | 46.4 °F |

9 °C | 48.2 °F |

10 °C | 50.0 °F |

20 °C | 68.0 °F |

30 °C | 86.0 °F |

40 °C | 104.0 °F |

50 °C | 122.0 °F |

60 °C | 140.0 °F |

70 °C | 158.0 °F |

80 °C | 176.0 °F |

90 °C | 194.0 °F |

100 °C | 212.0 °F |

200 °C | 392.0 °F |

300 °C | 572.0 °F |

400 °C | 752.0 °F |

500 °C | 932.0 °F |

600 °C | 1112.0 °F |

700 °C | 1292.0 °F |

800 °C | 1472.0 °F |

900 °C | 1652.0 °F |

1000 °C | 1832.0 °F |

**Click Here for Complete Biology Notes**

**Important websites to convert a 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.calculators.org/math/temperature.php
- https://www.engineeringtoolbox.com/temperature-d_291.html
- https://ostermiller.org/calc/temperature.html

**Important websites to convert a 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/
- http://www.csgnetwork.com/temp2conv.html
- https://www.lenntech.com/calculators/temperature/temperature.htm
- https://www.sciencemadesimple.com/temperature_conversions.php

**Celsius Scale Vs Fahrenheit Scale Citations **

- https://en.wikipedia.org/wiki/Scale_of_temperature
- http://www.jspayne.com/php/SummaryGet.php?FindGo=Fahrenheit
- https://www.nextgurukul.in/wiki/concept/icse/class-7/physics/heat/temperature-and-its-measurement/3959265
- https://www.britannica.com/technology/Celsius-temperature-scale
- https://www.britannica.com/science/Fahrenheit-temperature-scale
- https://www.answers.com/Q/What_is_used_in_the_U.S_Celsius_or_Fahrenheit
- https://www.answers.com/Q/On_which_temperature_scale_is_100_degrees_the_boiling_point_of_water
- https://study.com/academy/lesson/what-is-centigrade-definition-conversion.html
- https://kids.britannica.com/students/article/heat/274809
- https://didyouknow.org/celsius/

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