hertz [Hz] to millihertz [mHz] Converter

Quick Reference

1 hertz (Hz) = 1000 millihertz (mHz)

1 millihertz (mHz) = 0.001 hertz (Hz)

How to Convert hertz to millihertz

1 Hz = 1000 mHz
1 mHz = 0.001 Hz

To convert hertz to millihertz, multiply the value by 1000. To convert millihertz back to hertz, divide by 1000.

Example: convert 10 Hz to mHz:
10 Hz = 10 x 1000 = 10000 mHz

↔ Convert millihertz to hertz

hertz

Definition: Hertz (symbol: Hz) is the SI unit of frequency, defined as the number of cycles per second of a periodic phenomenon. One hertz is equivalent to one cycle or event per second.

History/origin: The hertz is named after Heinrich Hertz, a German physicist who proved the existence of electromagnetic waves in the late 19th century. The unit was adopted as a standard unit for frequency in the 20th century.

Current use: Hertz is widely used across various fields to measure frequency, including radio waves, audio signals, computer processing speeds, alternating current (AC) electricity, and any oscillating or repeating phenomenon. It's a fundamental unit in physics, engineering, and technology.

millihertz

Definition: A millihertz (mHz) is a unit of frequency equal to one thousandth (1/1000) of a hertz (Hz). The hertz, in turn, is the SI unit of frequency, defined as one cycle per second.

History/origin: The millihertz is derived from the hertz, named after the German physicist Heinrich Hertz, who made significant contributions to the understanding of electromagnetic waves. The prefix 'milli-' denotes a factor of 10<sup>-3</sup>, adhering to the SI system of units.

Current use: Millihertz is used to measure very low frequencies, often encountered in fields like geophysics (e.g., measuring seismic waves), biology (e.g., measuring slow biological rhythms), and some areas of electronics and signal processing where extremely slow oscillations or events are analyzed.

hertz to millihertz Conversion Table

hertz [Hz]	millihertz [mHz]
1 Hz	1000 mHz
2 Hz	2000 mHz
5 Hz	5000 mHz
10 Hz	10000 mHz
20 Hz	20000 mHz
50 Hz	50000 mHz
100 Hz	100000 mHz
200 Hz	200000 mHz
500 Hz	500000 mHz
1000 Hz	1000000 mHz

Common pairs of Frequency

millihertz

millihertz to hertz millihertz to kilohertz millihertz to megahertz millihertz to gigahertz millihertz to terahertz

hertz

hertz to millihertz hertz to kilohertz hertz to megahertz hertz to gigahertz hertz to terahertz

kilohertz

kilohertz to millihertz kilohertz to hertz kilohertz to megahertz kilohertz to gigahertz kilohertz to terahertz

megahertz

megahertz to millihertz megahertz to hertz megahertz to kilohertz megahertz to gigahertz megahertz to terahertz

gigahertz

gigahertz to millihertz gigahertz to hertz gigahertz to kilohertz gigahertz to megahertz gigahertz to terahertz

terahertz

terahertz to millihertz terahertz to hertz terahertz to kilohertz terahertz to megahertz terahertz to gigahertz

rotation per minute

rotation per minute to millihertz rotation per minute to hertz rotation per minute to kilohertz rotation per minute to megahertz rotation per minute to gigahertz

degree per second

degree per second to millihertz degree per second to hertz degree per second to kilohertz degree per second to megahertz degree per second to gigahertz

radian per second

radian per second to millihertz radian per second to hertz radian per second to kilohertz radian per second to megahertz radian per second to gigahertz

hertz [Hz] to millihertz [mHz] Converter

To convert hertz to millihertz, enter your value in the Hz field above and the result in mHz will appear instantly. You can also use the conversion factor shown in the table on this page to calculate manually. The formula is always the same: multiply your Hz value by the fixed conversion ratio to get the equivalent in mHz.

Our hertz to millihertz converter uses standardized conversion factors defined by international scientific and metrological organizations. All calculations are performed with full floating-point precision. You can also choose how many decimal places to display in the result, so you get exactly the level of detail you need.

Yes, absolutely. Simply swap the source and destination units in the converter — select mHz as your input unit and Hz as your output unit. The same precision and standardized conversion factor applies in both directions.

Converting between hertz and millihertz comes up regularly in engineering, scientific research, construction, and everyday tasks that involve measurements from different unit systems. Our converter eliminates the risk of manual calculation errors and saves time whenever you need to switch between these two units.

Yes, the hertz to millihertz converter is completely free. No account or registration is required, and there are no usage limits. It works on any device — smartphones, tablets, and desktop computers — directly in your browser.

hertz and millihertz are both units used to measure the same physical quantity, but they belong to different measurement systems or represent different scales. The mathematical relationship between them is fixed and constant, which is what makes accurate conversion possible. Scroll up to see the exact conversion factor, formula, and a reference table for common values.

hertz [Hz] to millihertz [mHz] Converter

Quick Reference

1 hertz (Hz) = 1000 millihertz (mHz)

1 millihertz (mHz) = 0.001 hertz (Hz)

How to Convert hertz to millihertz

1 Hz = 1000 mHz
1 mHz = 0.001 Hz

To convert hertz to millihertz, multiply the value by 1000. To convert millihertz back to hertz, divide by 1000.

Example: convert 10 Hz to mHz:
10 Hz = 10 x 1000 = 10000 mHz

↔ Convert millihertz to hertz

hertz

Definition: Hertz (symbol: Hz) is the SI unit of frequency, defined as the number of cycles per second of a periodic phenomenon. One hertz is equivalent to one cycle or event per second.

millihertz

Definition: A millihertz (mHz) is a unit of frequency equal to one thousandth (1/1000) of a hertz (Hz). The hertz, in turn, is the SI unit of frequency, defined as one cycle per second.