Zettahertz (ZHz): SI Unit for Extremely High Frequencies
The zettahertz (symbol: ZHz) is an SI-derived unit of frequency equal to 1021 hertz. It combines the SI prefix zetta-, meaning 1021, with the hertz, the SI derived unit of frequency. The zettahertz provides a convenient way to express extremely large frequency values using standard SI prefixes.
What Is a Zettahertz?
A zettahertz is a unit of frequency equal to one sextillion hertz (1021 Hz). It is one thousand exahertz and one-thousandth of a yottahertz.
Like other SI-prefixed units, the zettahertz simplifies scientific notation by replacing very large powers of ten with an internationally recognized prefix.
History of the Zettahertz
The SI prefix zetta- was officially adopted by the International Bureau of Weights and Measures (BIPM) in 1991 to extend the range of SI prefixes for extremely large quantities. When combined with the hertz, it forms the zettahertz, allowing scientists and engineers to express extraordinarily high frequencies using standardized SI notation.
Current Uses of the Zettahertz
Zettahertz is primarily used in theoretical physics, cosmology, advanced metrology, and scientific modeling involving extremely large frequency values. Although such frequencies are rarely encountered in practical engineering, the unit provides a standardized scale for research and scientific communication.
Zettahertz Conversion
One zettahertz is equal to:
- 1 × 1021 hertz (Hz)
- 1,000 exahertz (EHz)
- 0.001 yottahertz (YHz)
- 1,000,000 petahertz (PHz)
You can use ChangeUnit to convert zettahertz to hertz, exahertz, yottahertz, and many other frequency units.