Frequency Converter
Convert frequency between hertz, kilohertz, megahertz, gigahertz, terahertz and rpm instantly, with a reference table.
About the Frequency Converter
This frequency converter switches between hertz, kilohertz, megahertz, gigahertz, terahertz and revolutions per minute. Enter a value, choose your units, and the result appears instantly — useful for electronics, radio, audio and rotating machinery.
Frequency counts cycles per second: 1 Hz is one cycle per second, and each prefix steps up by a thousand — 1 kHz is 1000 Hz, 1 MHz is a million, 1 GHz a billion. Radio stations, Wi-Fi channels, CPU clocks and audio all live at different points on this scale.
The converter also handles rpm, dividing by 60 to reach hertz, so you can relate motor and engine speeds to frequency. Everything runs locally in your browser for instant, exact results.
How to Use the Frequency Converter
- 1Enter the frequency value to convert.
- 2Select the source and target units.
- 3Read the result and reverse conversion instantly.
- 4Use the reference table for common values.
Frequently Asked Questions
How many hertz are in a megahertz?
One megahertz is 1,000,000 hertz. The prefixes scale by 1000 each: 1 kHz = 1000 Hz, 1 MHz = 1000 kHz, 1 GHz = 1000 MHz. So a 2.4 GHz Wi-Fi signal oscillates 2.4 billion times per second. This tool converts across all of them.
How do I convert rpm to hertz?
Divide revolutions per minute by 60, since there are 60 seconds in a minute. A motor at 3000 rpm runs at 50 Hz. To go back, multiply hertz by 60. This lets you relate rotational speed to electrical frequency.
What frequencies do common devices use?
Mains electricity is 50 or 60 Hz, human hearing spans roughly 20 Hz to 20 kHz, AM radio is in the kHz range, FM and Wi-Fi in the MHz–GHz range, and CPUs run at several GHz. This converter helps you compare across those very different scales.
What is terahertz used for?
Terahertz (10¹² Hz) frequencies sit between microwaves and infrared light. They're used in imaging, spectroscopy and emerging high-speed communications research. The unit is included here for scientific and engineering work at the high end of the spectrum.
Is frequency the same as angular frequency?
Not quite. Ordinary frequency (Hz) counts full cycles per second. Angular frequency (radians per second) equals 2π times the frequency and is used in wave equations. This converter works with ordinary frequency in hertz and its multiples.