Megahertz to Gigahertz
A megahertz is one million hertz, used for FM radio frequencies and older CPU clock speeds. A gigahertz is one billion hertz, the standard unit for modern CPU clock speeds and Wi-Fi frequency bands. 1 MHz equals 0.001 GHz, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to frequency, measured here against frequency's base unit (Hz) — every other frequency unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
GHz = MHz × 0.001
MHz = GHz × 1,000
Worked example: 5 MHz × 0.001 = 0.005 GHz.
Conversion table
| Megahertz (MHz) | Gigahertz (GHz) |
|---|---|
| 1 MHz | 0.001 GHz |
| 2 MHz | 0.002 GHz |
| 3 MHz | 0.003 GHz |
| 5 MHz | 0.005 GHz |
| 10 MHz | 0.01 GHz |
| 20 MHz | 0.02 GHz |
| 25 MHz | 0.025 GHz |
| 50 MHz | 0.05 GHz |
| 100 MHz | 0.1 GHz |
| 250 MHz | 0.25 GHz |
| 500 MHz | 0.5 GHz |
| 1,000 MHz | 1 GHz |
Frequently asked
- How many Gigahertz in a megahertz?
- 1 MHz equals 0.001 GHz.
- How do I convert Megahertz to Gigahertz?
- Multiply the value in MHz by 0.001 to get GHz. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Megahertz and Gigahertz are both defined by a fixed conversion factor to frequency's base unit (Hz), so the result shown is exact to the precision displayed, not an approximation.