Gigahertz to Megahertz
Type a value in either box to convert between gigahertz and megahertz. The factor is 1000.
| Gigahertz | Megahertz |
|---|---|
| 1 GHz | 1000 MHz |
| 2 GHz | 2000 MHz |
| 3 GHz | 3000 MHz |
| 5 GHz | 5000 MHz |
| 10 GHz | 10000 MHz |
| 25 GHz | 25000 MHz |
| 50 GHz | 50000 MHz |
| 100 GHz | 100000 MHz |
How to use
- Enter a value in the Gigahertz field.
- The Megahertz figure appears immediately — no button to press.
- Typing in the Megahertz field converts back to Gigahertz the same way.
- Use the reference table for the values that come up most often.
Gigahertz to Megahertz formula
Converting gigahertz to megahertz is a single multiplication by 1000.
MHz = GHz × 1000
Put another way, one gigahertz is exactly 1,000 megahertz.
Why this factor: the gigahertz and the megahertz are both defined against the hertz, so dividing one definition by the other gives 1000 directly. Both definitions are set out in full below.
To go the other way, divide by 1000 — or use the Megahertz to Gigahertz converter, which is the same calculation reversed.
Worked example
Take 1000 GHz and multiply by the factor 1000: the result is 1000000 MHz.
1000 GHz × 1000 = 1000000 MHz
The converter above does this for any value you type, in either direction.
What is a gigahertz?
A gigahertz is one billion cycles per second — the scale of modern processors and wireless.
Definition: Exactly 1×10⁹ hertz.
Where it is used: CPU clock speeds, Wi-Fi bands (2.4 and 5 GHz), mobile networks, and radar.
What is a megahertz?
A megahertz is one million cycles per second.
Definition: Exactly 1×10⁶ hertz.
Where it is used: FM radio and broadcast bands, memory clock speeds, and radio communications.
Gigahertz vs Megahertz
The gigahertz and the megahertz belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many megahertz are in a gigahertz?
One gigahertz equals 1000 megahertz.
What is the formula to convert gigahertz to megahertz?
Multiply the number of gigahertz by 1000. To reverse it, divide by 1000 instead.
How do I convert megahertz back to gigahertz?
Divide by 1000, which is the same as multiplying by 0.001.
How many megahertz are in 10 gigahertz?
10 GHz works out to 10000 MHz.
How is the gigahertz defined?
Exactly 1×10⁹ hertz.