Planck temperature

The Planck temperature is the natural unit of temperature, denoted by T_P.

T_P = (c⁵ / G)^1/2 / k ≈ 1.4 × 10³²; kelvin

where:

c is the speed of light in a vacuum

is Dirac's constant

G is the gravitational constant

k is the Boltzmann constant

See also

• Natural units
• Planck length
• Planck mass
• Planck time