Frequency Converter (Hz, MHz, GHz, rpm)

Frequency Converter changes a frequency between hertz, kilohertz, megahertz, gigahertz and terahertz, and between those and revolutions or beats per minute. One hertz is one cycle a second, so the units cover everything that repeats: the 50 Hz mains supply in India, an FM station on 98.3 MHz, a Wi-Fi band at 2.4 or 5 GHz, a processor clock at 3.5 GHz, a motor or fan at 1,440 rpm, a song at 120 beats per minute, or a resting heart rate of 72 bpm (1.2 Hz). Revolutions per minute and beats per minute convert the same way — divide by 60 for hertz — and are kept as separate names so a motor’s speed and a heart rate each read naturally.

1. Type the frequency.
2. Choose its unit and the one you want, or press a common conversion such as rpm to Hz.
3. Read the answer, and every other unit in the table below it.

• Angular frequency (radians per second) is 2π times the frequency in hertz and is not listed.
• To go from a frequency to a wavelength, use the wavelength–frequency formula in the Engineering Calculator.
• An induction motor turns a little slower than its supply’s synchronous speed (1,500 rpm on 50 Hz for a 4-pole motor; nameplates say about 1,440). Converting the unit does not account for that slip.
• Conversions happen in your browser; nothing is sent.

Divide by 60. 3,000 rpm is 50 Hz; 1,440 rpm is 24 Hz. Multiply hertz by 60 to get rpm.

2,400 MHz. Each step — kHz, MHz, GHz, THz — is 1,000 times the one before.

50 Hz, as in most of Europe, Asia and Africa. North America uses 60 Hz.

1.2 Hz: 72 beats spread over 60 seconds.