Hertz to Gigahertz
Convert hertz to gigahertz instantly — one hertz is 1e-09 gigahertz.
| Hertz | Gigahertz |
|---|---|
| 1 Hz | 1e-09 GHz |
| 2 Hz | 2e-09 GHz |
| 3 Hz | 3e-09 GHz |
| 5 Hz | 5e-09 GHz |
| 10 Hz | 1e-08 GHz |
| 25 Hz | 2.5e-08 GHz |
| 50 Hz | 5e-08 GHz |
| 100 Hz | 1e-07 GHz |
How to use
- Enter a value in the Hertz field.
- The Gigahertz figure appears immediately — no button to press.
- Typing in the Gigahertz field converts back to Hertz the same way.
- Use the reference table for the values that come up most often.
Hertz to Gigahertz formula
To convert hertz to gigahertz, multiply by 1e-09.
GHz = Hz × 1e-09
Why this factor: the hertz and the gigahertz are both defined against the hertz, so dividing one definition by the other gives 1e-09 directly. Both definitions are set out in full below.
To go the other way, divide by 1e-09 — or use the Gigahertz to Hertz converter, which is the same calculation reversed.
Worked example
Take 1000 Hz and multiply by the factor 1e-09: the result is 1e-06 GHz.
1000 Hz × 1e-09 = 1e-06 GHz
The converter above does this for any value you type, in either direction.
What is a hertz?
The hertz is the SI unit of frequency — one cycle per second.
Definition: Defined as one reciprocal second (s⁻¹). Named after Heinrich Hertz.
Where it is used: Mains electricity (50 or 60 Hz), audio frequencies, and display refresh rates.
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.
Hertz vs Gigahertz
The hertz is an SI unit while the gigahertz is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many gigahertz are in a hertz?
One hertz equals 1e-09 gigahertz.
What is the formula to convert hertz to gigahertz?
Multiply the number of hertz by 1e-09. To reverse it, divide by 1e-09 instead.
How do I convert gigahertz back to hertz?
Divide by 1e-09, which is the same as multiplying by 1e+09.
How many gigahertz are in 10 hertz?
10 Hz works out to 1e-08 GHz.
How is the hertz defined?
Defined as one reciprocal second (s⁻¹). Named after Heinrich Hertz.