Temperature Unit Converters
All-in-One Temperature Converter
This all-in-one temperature converter lets you calculate all temperature units at once. Convert between temperature units including Celsius, Fahrenheit, Kelvin, and Rankine.
All Temperature Converters
The temperature converters below provide more detail about converting between the individual temperature units. Each one includes a definition of the individual temperature units, step-by-step instructions on performing the conversion, conversion examples, together with conversion charts and other visualisations.
What Temperature Units Are Supported?
|Celsius||°C||International System of Units (SI) / Metric System||Celsius is a unit of temperature measurement in the metric system. It is named after the Swedish astronomer Anders Celsius, who proposed the Celsius temperature scale in 1742. The Celsius scale is widely used around the world, particularly in scientific, industrial, and everyday applications.|
|Fahrenheit||°F||United States customary / Imperial system||Fahrenheit is a unit of temperature measurement primarily used in the United States and a few other countries. It is named after the German physicist Daniel Gabriel Fahrenheit, who introduced the Fahrenheit temperature scale in the early 18th century. The Fahrenheit scale is widely used in everyday contexts, such as weather reports, household thermometers, and discussions of temperature in the United States.|
|Rankine||°R||United States customary / Imperial system||Rankine is a unit of temperature measurement in the absolute temperature scale. It is primarily used in engineering and thermodynamics, particularly in the United States. The Rankine scale is named after the Scottish engineer and physicist William Rankine, who proposed the absolute temperature scale in the mid-19th century.|
|Kelvin||K||International System of Units Base (SI) / Metric System||Kelvin is the unit of temperature measurement in the Kelvin scale, which is the primary temperature scale used in scientific and international contexts. The Kelvin scale is an absolute temperature scale, where absolute zero, the theoretical point of complete absence of thermal energy, is defined as 0 Kelvin (K).|