Kelvin (K)
- is the SI unit of thermodynamic temperature
- it is defined by taking the fixed numerical value of the Boltzmann constant π to be 1.380649 x 10β23 when expressed in the unit π½Β·πΎβ1, which is equal to ππΒ·π2Β·π β2πΎβ1, where the kilogram, meter and second are defined in terms of β, π, and Ξπ£πΆπ