How to Convert Kelvin to Fahrenheit or Celsius ~ Wiki

The Kelvin scale is a thermodynamic temperature scale where zero defines the point at which molecules give off no heat and all thermal motion ceases. In order to convert Kelvin measurements into Fahrenheit or Celsius, a simple plug-and-chug is all that's called for.

Steps

Convert Kelvin to Fahrenheit

Write down the formula for converting Kelvin to Fahrenheit. The formula is: ºF = 1.8 x (K - 273) + 32.
Write down the Kelvin temperature. The Kelvin temperature in this example is 373 K. Remember that you should not use degrees when measuring the temperature in Kelvin.^[1]
Subtract 273 from the Kelvin temperature. Just subtract 273 from 373. 373 - 273 = 100.
Multiply the result by 9/5 or 1.8. Now, multiply the answer, 100, by 1.8. 100 * 1.8 = 180.
Add 32 to your final answer. Just add 32 to 180 to get your final answer. 180 + 32 = 212. Therefore, 373 K = 212ºF.

Convert Kelvin to Celsius

Write down the formula for converting Kelvin to Celsius. The formula is: ºC = K - 273.
Write down the Kelvin temperature. In this case, let's use 273 Kelvin.
Subtract 273 from the Kelvin temperature. Just subtract 273 from 273. 273 - 273 = 0. Therefore, 273K = 0 ºC.

Tips

Scientists generally omit the word "degree" when using Kelvin. Say '373 Kelvin' instead of '373 degrees Kelvin'.
For very precise conversions use 273.15 instead of 273.
To convert from Fahrenheit when there's no need to be precise I just take the temperature in Fahrenheit, subtract 32, and divide by 2. Eg: (100F-32)/2=34°c.
Any temperature difference will come out the same for Kelvin and Celsius. For instance the temperature difference between boiling water and melting ice can be calculated as follows:
- 100 ºC - 0 ºC = 100 ºC or
- 373.15 K - 273.15 K = 100 K

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Sources and Citations

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How to Convert Kelvin to Fahrenheit or Celsius