Convert Gigahertz to Megahertz
Gigahertz to megahertz is a single metric step — from the billions unit down to the millions unit — and it's the conversion you need to compare a 3.2 GHz CPU clock or a 2.4 GHz Wi-Fi band against a frequency quoted in megahertz. One gigahertz is exactly 1000 megahertz, so the number gets larger going this way.
Gigahertz to Megahertz conversion table
| Gigahertz (GHz) | Megahertz (MHz) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
The formula
To convert gigahertz to megahertz, multiply the number of gigahertz by 1000:
megahertz = gigahertz × 1000
A worked example
Say you have a 3.2 GHz CPU clock and want it in megahertz:
3.2 × 1000 = 3200 MHz
So 3.2 gigahertz is exactly 3200 megahertz.
Why the number is exact
"Giga" means exactly one billion and "mega" means exactly one million — both are defined metric prefixes on the same base unit, the hertz. A billion divided by a million is exactly a thousand, so one gigahertz is exactly 1000 megahertz. It's a single decade step, an exact power of a thousand, with no rounding.
When you'll use it
Comparing a CPU clock or a Wi-Fi and 5G band against a frequency quoted in megahertz, and moving between the two neighboring metric frequency units without losing precision.
Frequently asked questions
How many megahertz are in a gigahertz?
Exactly 1000 megahertz. A gigahertz is a billion hertz and a megahertz is a million hertz, so a gigahertz is a thousand megahertz.
What is 3.2 GHz in megahertz?
Exactly 3200 MHz. A 3.2 GHz CPU clock is 3200 megahertz — multiply 3.2 by 1000.
Is the gigahertz to megahertz conversion exact?
Yes. 'Giga' and 'mega' are both defined metric prefixes, so one gigahertz is exactly 1000 megahertz — an exact step, nothing rounded.