Convert Megahertz to Gigahertz
Megahertz to gigahertz is the conversion you reach for when a frequency is listed in MHz but modern hardware talks in GHz — like a Wi-Fi band or a processor clock. One megahertz is exactly 0.001 gigahertz, so the gigahertz number always comes out a thousand times smaller.
Megahertz to Gigahertz conversion table
| Megahertz (MHz) | Gigahertz (GHz) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 500 | 0.5 |
| 1,000 | 1 |
The formula
To convert megahertz to gigahertz, multiply the number of megahertz by 0.001 (which is exactly one thousandth):
gigahertz = megahertz × 0.001
A worked example
Say you have 2400 MHz — a common Wi-Fi band — and want it in gigahertz:
2400 × 0.001 = 2.4 GHz
So 2400 megahertz is exactly 2.4 gigahertz.
Why the number is exact
The prefixes "mega" and "giga" are defined as exactly one million and exactly one billion, one power of 1000 apart. Stepping from MHz to GHz is just moving the decimal three places the other way — an exact decade step — so 1 MHz is exactly 0.001 GHz, with no measurement or rounding involved.
When you'll use it
Matching a Wi-Fi band, a processor clock, or a radio frequency written in MHz against the gigahertz figures used on modern spec sheets and product boxes.
Frequently asked questions
How many gigahertz are in a megahertz?
Exactly 0.001 gigahertz, which is one thousandth. 'Giga' is a billion and 'mega' is a million, so a megahertz is one thousandth of a gigahertz — a fixed number, not a rounded one.
Is a 2400 MHz Wi-Fi band the same as 2.4 GHz?
Yes. 2400 MHz and 2.4 GHz are two names for the exact same frequency — divide the MHz figure by 1000 to get the GHz figure.
Is the megahertz to gigahertz conversion exact?
Yes. 'Mega' is exactly one million and 'giga' is exactly one billion, one power of 1000 apart, so 1 MHz is exactly 0.001 GHz with nothing rounded away.