The Planck temperature reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

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

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