Temperature Converter
Measure the degree of heat or cold.
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Unit Information
Kelvin (K)
Definition: The SI base unit of temperature, starting from absolute zero.
History: Named after British physicist Lord Kelvin.
Current Use: Used in science and engineering for precise measurements.
Celsius (°C)
Definition: A temperature scale where 0° is the freezing point of water and 100° is the boiling point.
History: Named after Swedish astronomer Anders Celsius.
Current Use: Used in most of the world for weather and science.
Fahrenheit (°F)
Definition: A temperature scale where 32° is the freezing point of water and 212° is the boiling point.
History: Developed by German physicist Daniel Gabriel Fahrenheit.
Current Use: Used primarily in the United States.
Rankine (°R)
Definition: An absolute temperature scale using Fahrenheit degrees.
History: Named after Scottish engineer William Rankine.
Current Use: Used in some engineering applications in the US.
Réaumur (°Ré)
Definition: A temperature scale where water freezes at 0° and boils at 80°.
History: Developed by René Antoine Ferchault de Réaumur.
Current Use: Historically used, now mostly obsolete.
All Unit Conversions
Did you know?
- Absolute zero (-273.15°C) is the coldest temperature theoretically possible.
- The Fahrenheit scale was named after German physicist Daniel Gabriel Fahrenheit.
- The Kelvin scale uses the same degree size as Celsius but starts at absolute zero.
Related Categories
Common Conversions
Convert Celsius to Fahrenheit
(°C * 9/5) + 32
Convert Fahrenheit to Celsius
(°F - 32) * 5/9