Kelvin Converter
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Kelvin (K) ➜ All Temperature Units (All)
Kelvin (K) - Definition and Overview
What is Kelvin?
The kelvin is the SI base unit of temperature. The symbol for kelvin is °K. Pure water freezes very close to 273.15 K and boils close to 373.15 K at standard atmospheric pressure.
Summary
- The Kelvin scale is the base unit of temperature in the International System of Units (SI)
- It is named after the Scottish physicist William Thomson, 1st Baron Kelvin
- The Kelvin scale is an absolute temperature scale starting at absolute zero, the theoretical point where all molecular motion ceases
- The freezing point of water is 273.15 K and the boiling point is 373.15 K under standard atmospheric pressure
- Unlike the Celsius and Fahrenheit scales, the Kelvin scale does not use the degree symbol (°) and is simply denoted as K.
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