Convert Gigahertz to Hertz
1 gigahertz is 1,000,000,000 Hz. One gigahertz is exactly 1000000000 hertz.
One gigahertz is 1000000000 hertz. To convert gigahertz to hertz, multiply by 1000000000; to go the other way, divide by 1000000000 or multiply by 1.0000 × 10^-9. The factor is exact rather than rounded: it follows from NIST Special Publication 811. A billion hertz.
Factor checked against the defining standard · How we check
- Gigahertz × 1000000000
1 * 10000000001,000,000,000 Hz
1 gigahertz in every frequency unit
| Unit | Value | Exact factor |
|---|---|---|
| hertz | 1,000,000,000 Hz | × 1,000,000,000 |
| kilohertz | 1,000,000 kHz | × 1,000,000 |
| megahertz | 1,000 MHz | × 1,000 |
| gigahertz (as entered) | 1 GHz | — |
| terahertz | 0.001 THz | × 0.001 |
| revolutions per minute | 60,000,000,000 rpm | × 60,000,000,000 |
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 gigahertz to hertz? The converter and the working
- 1.Take the measurement in gigahertz.
- 2.Multiply by 1000000000 — that is how many hertz fit in one gigahertz.
- 3.To go back the other way, divide by 1000000000, or multiply by 1.0000 × 10^-9.
Worked example: 25 gigahertz to hertz
- Formula
- GHz × 1000000000 = Hz
- Arithmetic
- 25 × 1000000000 = 25,000,000,000 Hz
- Answer
- 25 GHz = 25,000,000,000 Hz
The factor is exact, so this figure is exact too — only the display is rounded.
Gigahertz to hertz conversion table
| Gigahertz | Hertz |
|---|---|
| 1 GHz | 1,000,000,000 Hz |
| 2 GHz | 2,000,000,000 Hz |
| 3 GHz | 3,000,000,000 Hz |
| 4 GHz | 4,000,000,000 Hz |
| 5 GHz | 5,000,000,000 Hz |
| 6 GHz | 6,000,000,000 Hz |
| 7 GHz | 7,000,000,000 Hz |
| 8 GHz | 8,000,000,000 Hz |
| 9 GHz | 9,000,000,000 Hz |
| 10 GHz | 10,000,000,000 Hz |
| 12 GHz | 12,000,000,000 Hz |
| 15 GHz | 15,000,000,000 Hz |
| 20 GHz | 20,000,000,000 Hz |
| 25 GHz | 25,000,000,000 Hz |
| 50 GHz | 50,000,000,000 Hz |
| 100 GHz | 100,000,000,000 Hz |
| 200 GHz | 200,000,000,000 Hz |
| 300 GHz | 300,000,000,000 Hz |
| 500 GHz | 500,000,000,000 Hz |
| 1000 GHz | 1,000,000,000,000 Hz |
| 2000 GHz | 2,000,000,000,000 Hz |
| 5000 GHz | 5,000,000,000,000 Hz |
| 10000 GHz | 10,000,000,000,000 Hz |
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.
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.
How many hertz are in a gigahertz?
One gigahertz is 1000000000 hertz, exactly. Going the other way, one hertz is 1.0000 × 10^-9 gigahertz. 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 gigahertz.
Source: NIST Special Publication 811 — the hertz, and SI prefixes
Cite this page
- APA
- Rule Calculator. (2026). Convert Gigahertz to hertz. Rule Calculator. https://rulecalculators.com/convert/gigahertz-to-hertz
- MLA
- "Convert Gigahertz to hertz." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/gigahertz-to-hertz.
- Chicago
- Rule Calculator. "Convert Gigahertz to hertz." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/gigahertz-to-hertz.
The date is when the figures on this page were last checked against their source, not the day you opened it. Add your own access date if your style needs one.
Questions people actually ask
- How many hertz are in a gigahertz?
- 1000000000. 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.
- How do I convert hertz back to gigahertz?
- Divide by 1000000000, or multiply by 1.0000 × 10^-9 — they are the same operation.
Other frequency conversions
Hertz to gigahertz — the same conversion the other way.