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The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics. The kelvin (symbol: K) is the base unit of temperature in the International System of Units (SI). The kelvin is defined as the fraction 1⁄273.16 of the thermodynamic temperature of the triple point of water (exactly 0.01 °C or 32.018 °F). In other words, it is defined such that the triple point of water is exactly 273.16 K.

The Kelvin scale is named after the Belfast-born, Glasgow University engineer and physicist William Thomson, 1st Baron Kelvin (1824–1907). Unlike the degree Fahrenheit and degree Celsius, the kelvin is not referred to or typeset as a degree. The kelvin is the primary unit of temperature measurement in the physical sciences, but is often used in conjunction with the degree Celsius, which has the same magnitude. The definition implies that absolute zero (0 K) is equivalent to −273.15 °C (−459.67 °F).

Symbol/abbreviation: K
TEMPERATURE's base unit: kelvin (SI Unit)
In relation to the base unit (kelvin), 1 Kelvin = 1 kelvin.
[Conversion table] 1 Kelvin (K) to all temperature units
1 K= -272.15 celsius (°C)
1 K= 558.225 delisle (°De)
1 K= -457.87 fahrenheit (°F)
1 K= 1 kelvin (K)
1 K= -89.8095 newton scale (°N)
1 K= 1.8 rankine (°R)
1 K= -217.72 reaumur (°Re)
1 K= -135.37875 romer (°Rø)
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