Frequency Converter
Convert between 8 units of frequency — Hz, kHz, MHz, GHz, THz, mHz, RPM, and rad/s.
Quick conversions
All units
About the Frequency Converter
Frequency measures how many times a repeating event occurs per second, with the hertz (Hz) as its SI unit. In electronics, radio frequencies span from kHz (AM radio) through MHz (FM, WiFi) to GHz (5G, radar) and THz (terahertz imaging). In mechanical engineering, RPM (revolutions per minute) describes rotational speed. Angular frequency in rad/s is used in mathematics and physics to simplify wave equations.
Quick facts
- ›Human hearing range: 20 Hz to 20,000 Hz (20 kHz) — frequencies above are ultrasound
- ›Wi-Fi operates at 2.4 GHz and 5 GHz; 5G networks use up to 39 GHz (mmWave)
- ›The standard mains electricity frequency is 50 Hz in Europe and 60 Hz in the US
- ›Visible light occupies roughly 430–770 THz — far above any electronic oscillator
Common uses: Electronics, telecommunications, audio engineering, medical imaging, power systems, physics