Frequency Converter
Convert between 8 units of frequency — Hz, kHz, MHz, GHz, THz, mHz, RPM, and rad/s. Human hearing spans 20 Hz to 20 kHz. AM radio uses 530–1,700 kHz; FM radio 87.5–108 MHz; Wi-Fi 2.4 and 5 GHz; 5G mmWave up to 39 GHz. Mains electricity is 50 Hz (Europe) or 60 Hz (USA). Visible light occupies 430–770 THz — millions of times higher than any electronic oscillator.
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.
- ›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
Frequently Asked Questions
What units does the Frequency Converter support?
The Frequency Converter supports multiple units with instant conversion. Convert between 8 units of frequency — Hz, kHz, MHz, GHz, THz, mHz, RPM, and rad/s. Human hearing spans 20 Hz to 20 kHz. AM radio uses 530–1,700 kHz; FM radio 87.5–108 MHz; Wi-Fi 2.4 and 5 GHz; 5G mmWave up to 39 GHz. Mains electricity is 50 Hz (Europe) or 60 Hz (USA). Visible light occupies 430–770 THz — millions of times higher than any electronic oscillator. All results use SI-validated constants accurate to 8 significant figures.
Is this Frequency Converter free?
Yes — completely free. No registration, no limits. Works on all devices including mobile.
How accurate is this converter?
Accurate to 8 significant figures using precise mathematical constants validated against international SI standards (NIST and ISO 80000).