Convert attohertz [aHz] to picohertz [pHz] Online | Free frequency-wavelength Converter

Measuring Ultra-Low Frequencies

The attohertz (aHz) is an extremely small unit of frequency equal to 10⁻¹⁸ hertz, or one cycle per 10¹⁸ seconds (about 31.7 billion years). This unit is used to describe ultra-low frequency phenomena that occur on cosmic or geological timescales, far beyond everyday human experience.

Attohertz frequencies are relevant in cosmology, astrophysics, and geophysics, where they help scientists study processes that evolve over billions of years. For example, gravitational waves generated by massive cosmic events or the oscillations of the Earth’s magnetic field can be characterized by frequencies in the attohertz range. These waves have enormous wavelengths, often spanning millions or billions of kilometres.

Because the attohertz corresponds to such a long period between cycles, it is mostly used in theoretical research rather than practical applications. Understanding phenomena at this scale gives insight into the fundamental workings of the universe, including the slow evolution of cosmic structures, the expansion of space-time, and the early conditions following the Big Bang.

Understanding Ultra-Low Frequency Oscillations

The picohertz (pHz) is a unit of frequency equal to 10⁻¹² hertz, which means one cycle occurs every trillion seconds, or roughly 31,700 years. Picohertz frequencies are incredibly low and are mainly relevant in fields like astrophysics, geophysics, and cosmology, where processes unfold over extremely long timescales.

At picohertz frequencies, waves have extraordinarily long wavelengths, spanning millions to billions of kilometres. Such ultra-low frequencies are associated with phenomena like gravitational waves from massive cosmic events, large-scale oscillations of the Earth’s magnetic field, and long-term climate or geological cycles. Understanding picohertz frequencies allows scientists to study the slowest and largest-scale dynamics of our universe and planet.

Although picohertz frequencies are far beyond human perception and everyday technology, they provide valuable insight into the underlying processes shaping galaxies, solar systems, and Earth’s internal behavior over millennia. Research in this frequency range deepens our knowledge of cosmic evolution, gravitational physics, and Earth sciences.

Using picohertz as a measurement unit helps bridge the gap between familiar time scales and the vast expanses of time and space that govern the natural world at its grandest scale.