The Planck temperature is the unit of temperature in the system of Planck units. It has the value:

*T*= 1.41 × 10_{p}^{32}KIn SI units, measurements of temperature are made in degrees Kelvin (usually given the symbol

**K**). While the Kelvin is convenient for everyday usage, such as measuring the daytime temperature (around 300 K on a nice warm summer's day) or a human's normal body temperature (310 K = 37 degrees Celsius), a consequence of using SI units is that the fundamental constants take on values that are not always convenient for use in equations:Speed of light *c*= 299792458 m s^{-1}Gravitational constant *G*= 6.673(10) x 10^{-11}m^{3}kg^{-1}s^{-2}Plank's constant (reduced) = *h*/2π = 1.054571596(82) x 10^{-34}kg m^{2}s^{-1}Boltzmann constant *k*= 1.3806502(24) x 10^{-23}kg m^{2}s^{-2}K^{-1}The Planck temperature is found using the relationship between energy and temperature:

*T*_{p}= E_{p}/kwhere

*k*is the Boltzmann constant, and*E*(_{p}= m_{p}c^{2}*m*is the Planck mass and_{p}*c*is the speed of light).By redefining the base units for length, mass and time in terms of the Planck units, the fundamental constants have the values:

*c*=*G*= =*k*= 1.