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Convert, on line, between the units of temperature measurement you are most likely to come across.
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.
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)
In 1741 Anders Celsius, professor of astronomy at the University of Uppsala, Sweden, introduced a temperature scale with 0 the temperature at which water boiled and 100 the temperature at which water froze. Shortly after his death, the scale became known as the centigrade scale, but the fixed points were reversed, making 0 degrees the freezing point of water and 100 degrees its boiling point at atmospheric pressure.
Enter your value of °C and press convert. The equivalent in Fahrenheit, Kelvin and Rankine are displayed.
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