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ConvertersFahrenheit to CelsiusCelsius to FahrenheitCelsius to KelvinKelvin to CelsiusKelvin to FahrenheitFahrenheit to Kelvin

Edited by Koconnor, Sondra C, Imperatrix, Michael Delaney and 41 others

You can convert Fahrenheit to Celsius by using simple addition, subtraction, multiplication, and division. If you want to know how to do it, just follow these steps.

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EditConverters

Fahrenheit to Celsius Temperature Converter

Celsius to Fahrenheit Temperature Converter

EditMethod 1 of 6: Fahrenheit to Celsius

  1. 1
    Subtract 32 from the Fahrenheit temperature. For example, if your initial Fahrenheit temperature is 74°F, just subtract 32 from 74. 74-32 = 42.[1]
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  2. 2
    Divide the result by 1.8. Just divide your result, 42, by 1.8. 42/1.8 = 23°C. Therefore, 74°F can be converted to 23°C.
    • Note that 1.8 is the equivalent of 9/5. If you don't have a calculator or prefer working with fractions, you can divide your result from the first step by 9/5 instead of 1.8.

EditMethod 2 of 6: Celsius to Fahrenheit

  1. 1
    Multiply the Celsius temperature by 1.8. For example, if you're working with the temperature 30°C, you should first multiply it by 1.8, or 9/5. 30 x 1.8 = 54.[2]
  2. 2
    Add 32 to the result. Now, add 32 to 54, your result from step 1. 54 + 32 = 86°F. Therefore, 30°C is equivalent to 86°F.

EditMethod 3 of 6: Celsius to Kelvin

  1. 1
    Add 273.15 to your Celsius temperature. For example, if you're working with the temperature 30°C, just add 273.15 to that. 30 + 273.15 = 303.15K.

EditMethod 4 of 6: Kelvin to Celsius

  1. 1
    Subtract 273.15 from your Kelvin temperature. Let's say you're starting with a Kelvin temperature of 280K. Just subtract 273.15 from 280K to get the Celsius temperature. 280K - 273.15 = 6.85 °C.

EditMethod 5 of 6: Kelvin to Fahrenheit

  1. 1
    Multiply by 1.8. Let's say you're starting with a temperature of 295K. Just multiply that number by 1.8. 295 x 1.8 = 531.
  2. 2
    Subtract 459.7 from the result. Just subtract 459.7 from 531. 531 - 459.7 = 71.3 °F. Therefore, 295K = 71.3 °F.

EditMethod 6 of 6: Fahrenheit to Kelvin

  1. 1
    Subtract 32 from the Fahrenheit temperature. Let's say the temperature is 82°F. Subtract 32 from that number. 82 - 32 = 50.
  2. 2
    Multiply that number by 5/9. 50 x 5/9 = 27.7
  3. 3
    Add 273.15 to this number. Add 273.15 to 27.7. 273.15 + 27.7 = 300.8. Therefore, 82°F = 300.8K.
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Edit Tips

  • Here are some key conversion numbers worth remembering:
    • Water freezes at 0°C or 32°F.
    • Body temperature is typically 37°C or 98.6°F.
    • Water boils at 100°C or 212°F.
    • At -40, both temperatures are equal.
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  • When targeting an international audience do not use the words 'centigrade' or 'celsius'. Use 'degrees Celsius' instead.
  • Remember that Kelvin is always 273.15° more than Celsius.
  • Double check your math, it will make you more confident in your final answer.
  • You can also use the formula C = 5/9(F - 32) to convert Fahrenheit to Celsius, and 9/5C = F - 32 to convert Celsius to Fahrenheit. These formulas are short versions of this equation: C/100=F-32/180. As freezing point is within the range of 212 in the F thermometer, we have to subtract it, 32ºF, from F temperatures ( F-32 ) and we also have to subtract it from 212, and that's how we get the 180 cipher. This been done, both intervals are equal and we get the "long version" equation.

Edit Related wikiHows

How to
Estimate Celsius Temperatures in Fahrenheit

How to
Convert Kelvin to Fahrenheit or Celsius

Edit Sources and Citations

  1. ↑ http://www.mathsisfun.com/temperature-conversion.html
  2. ↑ http://www.mathsisfun.com/temperature-conversion.html

Article Info

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Categories: Featured Articles | Physics | Conversion Aids

Recent edits by: Colecrane, WanderWoman, Sydney Roth

In other languages:

Deutsch: Wie man Fahrenheit und Celsius umrechnet, Español: Cómo hacer conversiones de Fahrenheit y Celsius, Français: Comment convertir les degrés Celsius en degrés Fahrenheit ou en kelvins et vice versa, Italiano: Come Convertire da Fahrenheit a Celsius, Português: Como Fazer a Conversão entre Fahrenheit e Celsius, Nederlands: omrekenen tussen Celcius en Fahrenheit, Русский: конвертировать единицы измерения температуры

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