FHZ can refer to:
- Femtohertz, an SI unit for frequency equivalent to one quintillionth of a hertz
- Fakahina Airfield, an airfield in Fakahina atoll, French Polynesia, by IATA code
- , the fraction of stars with rocky planets in the habitable zone, in Seager's variant of the Drake equation; see Drake equation#Modifications
This disambiguation page lists articles associated with the title FHZ.
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