Planck Temperature

The temperature of the universe one Planck time after the Big Bang, the ceiling of physical heat.

Specifications & Metrics

symbol

TP

status

Measured — CODATA 2022 adjustment

value

1.416784 × 10³² ± 1.6 × 10²⁷ K

Relative Scale in Constants

Core Principles & Analysis

• About 1.4 × 10³² K, at which known physics stops describing matter.
• Above it, thermal radiation would form gravitational black holes faster than it radiates.
• The hottest the cosmos has ever been, reached before inflation began.