H
  • symbol for magnetic field strength, magnetic field intensity, or magnetic intensity.
  • symbol for hecto-
    (written as h)
  • symbol for Planck constant
    (written as h)
  • chemical symbol for hydrogen
  • symbol for hour
    (written as h)
  • A metric prefix representing 100. For example, 1 hectometer is equal to 100 meters. Its symbol is h.
  • A fundamental physical constant equal to approximately 6.62607 × 10-34 joule-second. It is the ratio of the energy of a photon to its frequency. Its symbol is h.

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