Frequency Converter: Hz, kHz, MHz, GHz
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Formula
1 MHz = 0.001 GHzAll Results
Hz 1,000,000
kHz 1,000
MHz 1
GHz 0.001
THz 0.000001
rpm 60,000,000
Quick Reference Table: Megahertz → Gigahertz
| Value (MHz) | Result (GHz) |
|---|---|
| 1 MHz | 0.001 GHz |
| 10 MHz | 0.01 GHz |
| 50 MHz | 0.05 GHz |
| 100 MHz | 0.1 GHz |
| 200 MHz | 0.2 GHz |
| 400 MHz | 0.4 GHz |
| 800 MHz | 0.8 GHz |
| 1,000 MHz | 1 GHz |
| 2,400 MHz | 2.4 GHz |
| 5,000 MHz | 5 GHz |
About Frequency Conversions
Frequency counts how many times per second something repeats. The hertz (Hz) is the SI unit of frequency, equal to one cycle per second. Kilohertz (kHz) and megahertz (MHz) are used in audio engineering and radio broadcasting. Gigahertz (GHz) is used for processor clock speeds and Wi-Fi frequencies (2.4 GHz and 5 GHz bands). Terahertz (THz) is used in spectroscopy and imaging. RPM (revolutions per minute) measures how fast engines and motors turn. One RPM equals 1/60 Hz.
Common Frequencies
Sound, mains power and radio on one scale. Concert pitch, the A above middle C, is 440 Hz.
| Source | Hz | kHz | MHz |
|---|---|---|---|
| Lowest audible sound | 20 | 0.02 | 0.00002 |
| Mains power (Europe) | 50 | 0.05 | 0.00005 |
| Mains power (US) | 60 | 0.06 | 0.00006 |
| Musical note A4 | 440 | 0.44 | 0.00044 |
| Highest audible sound | 20,000 | 20 | 0.02 |
| AM radio | 1,000,000 | 1,000 | 1 |
| FM radio | 100,000,000 | 100,000 | 100 |
| Wi-Fi 2.4 GHz band | 2,400,000,000 | 2,400,000 | 2,400 |
| Desktop CPU clock | 3,500,000,000 | 3,500,000 | 3,500 |
| Wi-Fi 5 GHz band | 5,000,000,000 | 5,000,000 | 5,000 |
History of the hertz
Frequency counts how often something repeats each second. Its unit is named after the physicist who first showed that radio waves exist.
- –1889 Heinrich Hertz produced and detected electromagnetic waves in his laboratory in Karlsruhe, proving that they exist.
- The International Electrotechnical Commission named the unit of frequency, one cycle per second, the hertz.
- The International System of Units (SI) adopted the hertz (Hz) as its unit of frequency.
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