Index

DEFININGCONSTANT: Planck constant

  • PID: si:definingconstant:planck_constant:2019
  • Definition: The Planck constant, h, is exactly 6.626 070 15 × 10-34 J s.
  • Source: SI Brochure 9th Ed. 2019, p 127
  • Formatted: 6.626 070 15 x 10-34 J s
  • Numerical Value: 6.62607015E-34
  • Unit: J s
  • Unit in Base SI: kg m2 s-1
  • Notes
    1. This value was fixed by the CGPM in 2018 (Resolution 1), with effect from 20 May 2019.
    2. The Planck constant is a fundamental constant that determines quantum effects and affects all particles and fields equally on all scales and in all environments.
  • Related Definitions
    • hasConstantSymbol -> h