Quectohertz (qHz): The Smallest SI Unit for Frequency
The quectohertz (symbol: qHz) is an SI-derived unit of frequency equal to 10−30 hertz. It combines the SI prefix quecto-, meaning 10−30, with the hertz, the SI derived unit of frequency. The quectohertz is intended for expressing extremely small frequencies using standard SI notation.
What Is a Quectohertz?
A quectohertz is a unit of frequency equal to 10−30 hertz. It is one-thousandth of a rontohertz and one millionth of a yoctohertz.
Like other SI-prefixed units, the quectohertz allows scientists to write extremely small frequency values without resorting to lengthy decimal expressions or scientific notation alone.
History of the Quectohertz
The SI prefix quecto- was officially adopted by the General Conference on Weights and Measures (CGPM) in 2022. It was introduced alongside the ronto- prefix to extend the International System of Units (SI) for measurements at extremely small scales. Applying the prefix to the hertz creates the quectohertz, a standardized SI unit for ultra-low frequencies.
Current Uses of the Quectohertz
The quectohertz has limited practical use but is valuable in theoretical physics, metrology, cosmology, and advanced scientific research involving extraordinarily small frequencies. It also serves as a standardized SI unit for educational materials and scientific documentation.
Quectohertz Conversion
One quectohertz is equal to:
- 1 × 10−30 hertz (Hz)
- 0.001 rontohertz (rHz)
- 0.000001 yoctohertz (yHz)
- 1 × 10−24 microhertz (µHz)
You can use ChangeUnit to convert quectohertz to hertz, rontohertz, yoctohertz, and many other frequency units.