Hertz to Millihertz Converter

1 Hertz = 1000 Millihertz
Hertz (Hz) ➜ Millihertz (mHz)
 
Hz

Hertz vs Millihertz Comparison Chart

Source - HertzTarget - Millihertz

Hertz (Hz) - Definition and Overview

What is Hertz?

Hertz is defined as the frequency equalling one cycle per second. The hertz is the SI derived unit for frequency in the metric system. Hertz can be abbreviated as Hz.

Summary

  • Hertz (Hz) is the standard unit of frequency in the International System of Units (SI), defined as one cycle per second
  • It is widely used across various fields including physics, engineering, and music to measure the frequency of periodic phenomena such as sound waves, electromagnetic waves, and mechanical vibrations.

Millihertz (mHz) - Definition and Overview

What is Millihertz?

Millihertz is a measure of frequency equal to one by thousandth(1/1000) of a cycle per second. Millihertz can be abbreviated as mHZ.

Summary

  • Millihertz (mHz) is a unit of frequency in the International System of Units (SI) equal to one thousandth of a hertz (1 mHz = 10^-3 Hz)
  • It is used to measure low frequencies, commonly in applications such as biological rhythms and certain types of electronic signals.

How to Convert Hertz to Millihertz?

1 Hertz is equal to 1000 Millihertz. To convert Hertz to Millihertz, use this simple formula:

Millihertz = Hertz x 1000

So, just multiply the number of Hertz by 1000 to get equivalent value in Millihertz.

Example 1:

Convert 5 Hertz to Millihertz
5 x 1000 = 5000 Millihertz

Example 2:

Convert 7.5 Hertz to Millihertz
7.5 x 1000 = 7500 Millihertz

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.