{{Wiktionary|HZ|Hz|hz}} '''Hz''' is the International Standard symbol for hertz, a unit of frequency.
'''Hz.''' may also stand for:
* Hazrat, an honorific Arabic and Turkish title used to honour a person, used especially for prophets, e.g. Hz. Muhammad, Hz. Ibrahim, etc.
'''HZ''' may also stand for: * HZ (character encoding) * Habitable zone, the distance from a star where a planet can maintain Earth-like life * Hazard, a situation that poses a level of threat * Haze, in meteorology, METAR code HZ * Herero language (ISO 639 alpha-2) * Herpes zoster, the shingles virus * Holden HZ, an automobile produced by General Motors Holden in the late 1970s * Hz-program, a typographic composition computer program created by Hermann Zapf. * HZ University of Applied Sciences, a vocational university in Zeeland, Netherlands * SAT Airlines (IATA airline designator) * Saudi Arabia (aircraft registration code) * HŽ, the acronym of Croatian Railways ({{lang|hr|Hrvatske željeznice}})
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