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Temperature Conversion

Kelvin (K)

The Kelvin scale, called after the Scot - Lord Kelvin (William Thompson 1824-1907), is the fundamental temperature scale. It is physically impossible to have anything colder than zero Kelvin, even although the conversion calculator below allows you to enter negative values of K.
Enter your value of K and press convert. The equivalent in Celsius, Fahrenheit and Rankine are displayed.

Kelvin

to Celsius
=(K+273.15)

to Fahrenheit
=(K+273.15)*1.8+32

to Rankine
=(K*9/5)

 

Rankine (° R)

Enter your value of °R and press convert. The equivalent in Celsius, Fahrenheit and Kelvin are displayed.

Rankine

to Celsius
=(°R*5/9)-273.15

to Fahrenheit
=°R-459.67

to Kelvin
=°R*5/9

 

Fahrenheit (° F)

Gabriel Fahrenheit, an instrument maker in Amsterdam, used mercury as the fluid in a thermometer. He calibrated the thermometer to read 212° for the boiling temperature of water and to read 32° for the freezing point of water. This has become known as the Fahrenheit scale. Enter your value of °F and press convert. The equivalent in Celsius, Kelvin and Rankine are displayed.

Fahrenheit

to Celsius
=(°F-32)/1.8

to Kelvin
=(°F-32)/1.8-273.15

to Rankine
=°F+459.67


 

Celsius (° C)

Enter your value of °C and press convert. The equivalent in Fahrenheit, Kelvin and Rankine are displayed.

Celsius

to Fahrenheit
=(°C*1.8)+32

to Kelvin
=°C+273.15

to Rankine
=(°C*1.8)+491.67



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