# What is kelvin Unit of Measurement

The kelvin is
a unit of measure for temperature based upon an absolute scale. It is one of
the seven base units in the International System of Units (SI) and is assigned
the unit

symbol K. 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 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 Lord Kelvin (1824–1907), who wrote of the need for an
"absolute thermometric scale". 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 Celsius degree, which has the same
magnitude. The definition implies that absolute zero (0 K) is equivalent to
−273.15 °C (−459.67 °F).

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