Convert Fahrenheit to Celsius (F to C)

In next fields, kindly type your value in the text box under title [ From: ] to convert from fahrenheit to celsius (F to C). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].

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Definitions:

Fahrenheit (abbreviations: F, or °F, or deg F): is a temperature scale based on one proposed in 1724 by Amsterdam-based physicist Daniel Gabriel Fahrenheit (1686–1736), with regard to whom the scale is named.

Celsius (abbreviations: C, or °C, or deg C): also known as centigrade, is a SI metric scale and unit of measurement for temperature and used by most countries in the world. It is named with regard to the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale.


How to Convert Degree Fahrenheit to Degree Celsius

Example: How many degree Celsius are equivalent to 55.11 degree Fahrenheit?


As;

1 degree Fahrenheit = (5/9)*(X-32) degree Celsius

55.11 degree Fahrenheit = Y degree Celsius

Assuming Y is the answer, and by substitution principle;

Y equals ( (5/9)*(55.11-32) ) over 1, where X is substituted by 55.11

(i.e.) Y = ( (5/9)*(55.11-32) ) / 1 = 12.838888888889 degree Celsius

Answer is: 12.838888888889 degree Celsius are equivalent to 55.11 degree Fahrenheit.


Practice Question: Convert the following units into C:


N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 87.66 F

( ii ) 72.54 F

( iii ) 91.38 F



References
  • Wikipedia
  • USMA
  • NIST

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