Frequency Converter
Convert between different frequency units including Hz, kHz, MHz, GHz, and more.
Frequency Conversion
Common Frequencies
Frequency Reference Guide
Frequency Unit Relationships
1 kHz = 1,000 Hz
1 MHz = 1,000 kHz = 1,000,000 Hz
1 GHz = 1,000 MHz = 1,000,000,000 Hz
1 THz = 1,000 GHz = 10¹² Hz
1 RPM = 1/60 Hz ≈ 0.0167 Hz
1 RPS = 1 Hz
1 rad/s = 1/(2π) Hz ≈ 0.159 Hz
Angular frequency: ω = 2πf
Frequency Spectrum Applications
Audio Range: 20 Hz - 20 kHz (human hearing)
Radio Waves: 3 kHz - 300 GHz
AM Radio: 535 - 1605 kHz
FM Radio: 88 - 108 MHz
WiFi 2.4GHz: 2.4 - 2.485 GHz
WiFi 5GHz: 5.15 - 5.85 GHz
Microwave: 300 MHz - 300 GHz
Visible Light: ~400 - 800 THz
Technical Applications
CPU Clock: 1-5 GHz (modern processors)
AC Power: 50-60 Hz (mains electricity)
Musical Note A4: 440 Hz (concert pitch)
Ultrasound:>20 kHz (medical imaging)
Radar: 1-100 GHz (various bands)
X-rays: 30 PHz - 30 EHz (10¹⁶-10¹⁹ Hz)
Conversion Tips
• Period (T) and frequency (f) are reciprocals: T = 1/f
• Higher frequency = shorter wavelength (for electromagnetic waves)
• Angular frequency (ω) = 2π × frequency (f)
• Use scientific notation for very large or small frequencies
Understanding Frequency Conversions
Frequency measures how many times something repeats per second, with the hertz (Hz) as the SI unit, one hertz is one cycle per second. This converter scales between hertz, kilohertz (kHz), megahertz (MHz), gigahertz (GHz) and terahertz (THz).
The steps are simple powers of 1,000: 1 kHz = 1,000 Hz, 1 MHz = 1,000,000 Hz, and so on. These units appear constantly in computing (CPU clock speeds in GHz), radio (FM stations in MHz) and audio (sound in Hz and kHz), so converting between them is a routine engineering task.
Frequently Asked Questions
How many hertz are in a kilohertz?
One kilohertz (kHz) equals 1,000 hertz (Hz).
How many megahertz are in a gigahertz?
One gigahertz (GHz) equals 1,000 megahertz (MHz), or 1,000,000,000 hertz.
What is hertz used to measure?
Hertz measures frequency, the number of cycles or repetitions per second, used for sound, radio waves and processor speeds.
How many Hz is 2.4 GHz?
2.4 GHz equals 2,400,000,000 Hz (2.4 billion cycles per second).