Frequency Converter
Convert between frequency units including Hertz (Hz), Kilohertz (kHz), Megahertz (MHz), Gigahertz (GHz), RPM, and more.
Frequency Converter
Convert between frequency units. All conversions use hertz (Hz) as the base SI unit.
Result
Enter a value and click "Convert" to see the result
Understanding Frequency Units
Frequency measures the number of occurrences of a repeating event per unit of time. The SI unit of frequency is the Hertz (Hz), equal to one cycle per second.
Common Frequency Units:
- Hertz (Hz): SI unit — 1 cycle per second
- Kilohertz (kHz): 1,000 Hz — AM radio, audio frequencies
- Megahertz (MHz): 1,000,000 Hz — FM radio, CPU clocks (older)
- Gigahertz (GHz): 1,000,000,000 Hz — modern CPUs, Wi-Fi, 5G
- Terahertz (THz): 10¹² Hz — infrared light, spectroscopy
- RPM: Revolutions per minute — motors, engines, hard drives
Real-world Examples:
- Human hearing range: 20 Hz – 20 kHz
- AC power (US): 60 Hz
- FM radio: 87.5 – 108 MHz
- Wi-Fi 2.4 GHz band: 2,400 – 2,500 MHz
- Wi-Fi 5 GHz band: 5,150 – 5,850 MHz
- Modern CPU: 3 – 5 GHz
Frequently Asked Questions
What is frequency measured in?
Frequency is measured in hertz (Hz), meaning cycles per second. Larger units include kilohertz (kHz, thousands), megahertz (MHz, millions), and gigahertz (GHz, billions).
How many Hz are in 1 GHz?
1 GHz = 1,000,000,000 Hz (one billion). A 3 GHz CPU completes about three billion cycles per second.
How do I convert MHz to GHz?
Divide the MHz value by 1,000. So 2,400 MHz = 2.4 GHz, a common Wi-Fi and CPU frequency.
What is the difference between kHz, MHz, and GHz?
Each step is a factor of 1,000: 1 MHz = 1,000 kHz and 1 GHz = 1,000 MHz. They scale audio, radio, and processor frequencies respectively.