Celsius, Fahrenheit, Kelvin, Réaumur, and Rankine
Temperature Conversion 2


This calculator requires the use of Javascript enabled and capable browsers. This is the lean and chart oriented version of the temperature converter and related formulae. (If your are NOT a Type "A" personality and want to get some additional explanations of the formulae and calculations, more text intense version. This shows the formulae also and has the calculator, but the methodology of display is quite different.) We have created a chart of the formulas needed to convert temperature to and from Celsius, Fahrenheit, Kelvin, Réaumur, and Rankine. We have also created a temperature converter from those formulae, for your (Type "A" personality QUICK) use. Though two of the five scales are not considered popular, there are still situations and applications that use them. The formulas can teach the process and the converter will make your life easier. There is a chart below the converter and formulae that displays at a glance the important ranges of each scale.


Temperature 5 Scale Converter

°C = degree Celsius (centigrade),   °F = degree Fahrenheit,
K = degree Kelvin,   °Re = degree Réaumur,   °Ra = degree Rankine

  °Celsius
  °Fahrenheit
    Kelvin
  °Réaumur
  °Rankine


Temperature Scale Formula And Equations
From               To               Formulae
Formulae Conversion Factors
9/5 = 1.8    9/4 = 2.25   á10/8 = 1.25
Celsius Fahrenheit  F =  C × 1.8 + 32
Celsius Kelvin K = C  + 273.15
Celsius Réaumur  Re =  C × 0.8
Celsius Rankine  Ra =  C × 1.8 + 32 + 459.67
Fahrenheit Celsius  C = ( F - 32) / 1.8
Fahrenheit Kelvin K = ( F + 459.67) / 1.8
Fahrenheit Réaumur  Re = ( F - 32) / 2.25
Fahrenheit Rankine  Ra =  F + 459.67
Kelvin Celsius  C = K - 273.15
Kelvin Fahrenheit  F = K × 1.8 - 459.67
Kelvin Réaumur  Re = (K - 273.15) × 0.8
Kelvin Rankine  Ra = K × 1.8
Réaumur Celsius  C =  Re × 1.25
Réaumur Fahrenheit  F =  Re × 2.25 + 32
Réaumur Kelvin K =  Re × 1.25 + 273.15
Réaumur Rankine  Ra =  Re × 2.25 + 32 + 459.67
Rankine Celsius  C = ( Ra - 32 - 459.67) / 1.8
Rankine Fahrenheit  F =  Ra - 459.67
Rankine Kelvin K =  Ra/ 1.8
Rankine Réaumur  Re = ( Ra - 32 - 459.67) / 2.25


 Temperature Scale Ranges
°C = degree Celsius (centigrade),   °F = degree Fahrenheit,
K = degree Kelvin,   °Re = degree Réaumur,   °Ra = degree Rankine
Scale Factor °C °F K °Re °Ra
Boiling point of water at 1 atmosphere 100 212 373.15 80 671.67
Freezing point of water at 1 atmosphere 0 32 273.15 0 491.67


Version 2.8.3
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