Megahertz (MHz)
Definition
One million hertz (10⁶ Hz).
History
The megahertz is one million hertz, the scale of radio broadcasting and early computer processors. It marked the clock speed of personal computers into the 1990s.
Where it is used
Megahertz are used for radio frequencies and were long the unit for processor clock speeds.
Typical uses include radio, CPU clocks (older).
Conversion pages
These pages convert megahertz to or from another unit in frequency.
No conversion pages use this unit yet.
Other Frequency units
Sources
- BIPM SI BIPM SI Brochure (2019); ISO 80000-3 · Dataset reviewed Nov 11, 2026