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