Convert temperature between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Type in any unit and see all others.
Enter a temperature in any unit and instantly see the equivalent in Celsius, Fahrenheit, Kelvin, and Rankine — all at once. Unlike multiplicative unit conversions, temperature uses offset formulas, which this tool handles correctly for all combinations.
Enter a value in the number box and select the unit you're converting from. All other units update instantly in the cards below.
Absolute zero is the theoretical lowest possible temperature: 0 K = −273.15 °C = −459.67 °F. Nothing can be colder — it represents the complete absence of thermal energy.
Rankine is an absolute temperature scale like Kelvin, but based on Fahrenheit degrees. 0 °R = 0 K = absolute zero. It is used in some engineering fields in the United States.
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