Convert Hertz to Gigahertz
1 hertz is 1.00e-9 GHz. One hertz is exactly 1e-9 gigahertz.
One hertz is 1.0000 × 10^-9 gigahertz. To convert hertz to gigahertz, multiply by 1.0000 × 10^-9; to go the other way, divide by 1.0000 × 10^-9 or multiply by 1000000000. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Special Publication 811. One cycle per second.
Factor checked against the defining standard · How we check
- Hertz × 1.0000 × 10^-9
1 * 1e-90 GHz
1 hertz in every frequency unit
| Unit | Value | Exact factor |
|---|---|---|
| hertz (as entered) | 1 Hz | — |
| kilohertz | 0.001 kHz | × 0.001 |
| megahertz | 0.000001 MHz | × 0.000001 |
| gigahertz | 0.000000001 GHz | × 0.000000001 |
| terahertz | 0.000000000001 THz | × 0.000000000001 |
| revolutions per minute | 60 rpm | × 60 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert hertz to gigahertz? The converter and the working
- 1.Take the measurement in hertz.
- 2.Multiply by 1.0000 × 10^-9 — that is how many gigahertz fit in one hertz.
- 3.To go back the other way, divide by 1.0000 × 10^-9, or multiply by 1000000000.
Worked example: 25 hertz to gigahertz
- Formula
- Hz × 1.0000 × 10^-9 = GHz
- Arithmetic
- 25 × 1.0000 × 10^-9 = 2.50e-8 GHz
- Answer
- 25 Hz = 2.50e-8 GHz
The factor is rounded for display; the figure above is computed from the full value.
Hertz to gigahertz conversion table
| Hertz | Gigahertz |
|---|---|
| 1 Hz | 1.00e-9 GHz |
| 2 Hz | 2.00e-9 GHz |
| 3 Hz | 3.00e-9 GHz |
| 4 Hz | 4.00e-9 GHz |
| 5 Hz | 5.00e-9 GHz |
| 6 Hz | 6.00e-9 GHz |
| 7 Hz | 7.00e-9 GHz |
| 8 Hz | 8.00e-9 GHz |
| 9 Hz | 9.00e-9 GHz |
| 10 Hz | 1.00e-8 GHz |
| 12 Hz | 1.20e-8 GHz |
| 15 Hz | 1.50e-8 GHz |
| 20 Hz | 2.00e-8 GHz |
| 25 Hz | 2.50e-8 GHz |
| 50 Hz | 5.00e-8 GHz |
| 100 Hz | 1.00e-7 GHz |
| 200 Hz | 2.00e-7 GHz |
| 300 Hz | 3.00e-7 GHz |
| 500 Hz | 5.00e-7 GHz |
| 1000 Hz | 0.000001 GHz |
| 2000 Hz | 0.000002 GHz |
| 5000 Hz | 0.000005 GHz |
| 10000 Hz | 0.00001 GHz |
What is a hertz?
One cycle per second. The SI unit is defined as a reciprocal second, which is why it is used for periodic events and never for a rate of something that is not periodic.
What is a gigahertz?
A billion hertz. Wi-Fi runs at 2.4 and 5 GHz, and a processor clock has been quoted in these since about 2000 — a 3.5 GHz core starts a new cycle every 286 picoseconds.
How many gigahertz are in a hertz?
One hertz is 1.0000 × 10^-9 gigahertz. Going the other way, one gigahertz is 1000000000 hertz. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every frequency unit here
The whole group — 6 units with their symbols and the size of each one in hertzs — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a hertz.
Source: NIST Special Publication 811 — the hertz, and SI prefixes
Cite this page
- APA
- Rule Calculator. (2026). Convert Hertz to gigahertz. Rule Calculator. https://rulecalculators.com/convert/hertz-to-gigahertz
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- "Convert Hertz to gigahertz." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/hertz-to-gigahertz.
- Chicago
- Rule Calculator. "Convert Hertz to gigahertz." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/hertz-to-gigahertz.
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Questions people actually ask
- How many gigahertz are in a hertz?
- 1.0000 × 10^-9. A billion hertz. Wi-Fi runs at 2.4 and 5 GHz, and a processor clock has been quoted in these since about 2000 — a 3.5 GHz core starts a new cycle every 286 picoseconds.
- How do I convert gigahertz back to hertz?
- Divide by 1.0000 × 10^-9, or multiply by 1000000000 — they are the same operation.
Other frequency conversions
Gigahertz to hertz — the same conversion the other way.