Quettahertz (QHz): SI Unit for Extremely High Frequencies
The quettahertz (symbol: QHz) is an SI-derived unit of frequency equal to 1030 hertz. It combines the SI prefix quetta-, meaning 1030, with the hertz, the SI derived unit for frequency. The quettahertz is designed to represent exceptionally large frequencies using the standard International System of Units (SI).
What Is a Quettahertz?
A quettahertz is a unit of frequency equal to 1030 hertz. It is one thousand ronnahertz or one million yottahertz.
The unit extends the SI prefix system to accommodate extraordinarily large frequency values that may arise in theoretical physics, cosmology, and scientific computation.
History of the Quettahertz
The SI prefix quetta- was officially adopted by the General Conference on Weights and Measures (CGPM) in 2022. It was introduced to meet the growing need for standardized prefixes representing extremely large quantities. When combined with the hertz, it forms the quettahertz, the largest currently defined SI-prefixed unit of frequency.
Current Uses of the Quettahertz
The quettahertz has few practical engineering applications today but is valuable in theoretical physics, cosmology, advanced metrology, and scientific education. It provides a standardized SI expression for frequency values that would otherwise require extremely large powers of ten.
Quettahertz Conversion
One quettahertz is equal to:
- 1 × 1030 hertz (Hz)
- 1,000 ronnahertz (RHz)
- 1,000,000 yottahertz (YHz)
- 1 × 1012 exahertz (EHz)
You can use ChangeUnit to convert quettahertz to hertz, ronnahertz, yottahertz, and many other frequency units.