Hertz to Millihertz Converter

A hertz (Hz) is the SI base unit of frequency, defined as one cycle per second. It represents the fundamental measure of frequency, named after German physicist Heinrich Hertz, and forms the basis for all other frequency measurements.

The hertz was named after Heinrich Hertz in 1930, who proved the existence of electromagnetic waves. It was adopted as the SI unit of frequency in 1960, replacing the older term 'cycles per second' and providing a unified measure for all periodic phenomena.

Hertz is universally used for measuring all types of frequencies, from sound waves to electromagnetic radiation. It's fundamental in physics, engineering, music, and technology, serving as the base unit for all frequency measurements and calculations.

A millihertz (mHz) is a unit of frequency equal to one thousandth of a hertz (0.001 Hz). It represents very low frequencies found in extremely slow oscillations, geological processes, and some biological rhythms.

The millihertz became necessary for describing extremely slow periodic phenomena in scientific research. It was particularly important in geophysics, astronomy, and biological studies where natural cycles occur over very long time periods.

Millihertz is used in geophysics for seismic wave analysis, astronomy for stellar oscillations, biological research for circadian rhythms, and precision timing applications. It's essential for measuring very slow natural cycles and long-period oscillations.