Frequency Converter
Convert between hertz, kilohertz, megahertz, gigahertz, and RPM.
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How to use this calculator
- 1
Enter the frequency value you want to convert.
- 2
Select the unit you are converting from (e.g. MHz).
- 3
Select the target unit (e.g. GHz).
- 4
The result appears instantly.
Frequently asked questions
How many MHz are in 1 GHz?
There are exactly 1,000 MHz (megahertz) in 1 GHz (gigahertz). A 3.5 GHz processor runs at 3,500 MHz.
What is hertz?
Hertz (Hz) is the SI unit of frequency, measuring cycles per second. 1 Hz = 1 cycle per second. It is named after physicist Heinrich Hertz.
How do I convert RPM to Hz?
Divide RPM by 60 to get Hz. For example, 3,600 RPM = 3,600 ÷ 60 = 60 Hz.
What frequency is WiFi?
Standard WiFi operates at 2.4 GHz or 5 GHz. Newer WiFi 6E also uses 6 GHz. These frequencies are in the microwave range of the electromagnetic spectrum.
Frequency unit conversion
The hertz and its multiples
Hertz (Hz) is the base unit of frequency. Common multiples: 1 kHz = 1,000 Hz (AM radio), 1 MHz = 1,000,000 Hz (FM radio, processors), 1 GHz = 10⁹ Hz (WiFi, processors, 5G). Human hearing range is approximately 20 Hz to 20,000 Hz (20 kHz).
Frequency in everyday technology
CPU clock speeds: 2–5 GHz. WiFi: 2.4 / 5 / 6 GHz. FM radio: 87.5–108 MHz. AM radio: 535–1,705 kHz. Power grid (AC): 50 Hz (Europe) or 60 Hz (US). 5G networks: 600 MHz to 86 GHz.
RPM and frequency
Revolutions per minute (RPM) measures rotational frequency. To convert to Hz, divide by 60. A car engine at 3,000 RPM = 50 Hz. A hard drive spinning at 7,200 RPM = 120 Hz.
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