Convert Hertz to Terahertz
1 hertz is 1.00e-12 THz. One hertz is exactly 1e-12 terahertz.
One hertz is 1.0000 × 10^-12 terahertz. To convert hertz to terahertz, multiply by 1.0000 × 10^-12; to go the other way, divide by 1.0000 × 10^-12 or multiply by 1000000000000. 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^-12
1 * 1e-120 THz
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 terahertz? The converter and the working
- 1.Take the measurement in hertz.
- 2.Multiply by 1.0000 × 10^-12 — that is how many terahertz fit in one hertz.
- 3.To go back the other way, divide by 1.0000 × 10^-12, or multiply by 1000000000000.
Worked example: 25 hertz to terahertz
- Formula
- Hz × 1.0000 × 10^-12 = THz
- Arithmetic
- 25 × 1.0000 × 10^-12 = 2.50e-11 THz
- Answer
- 25 Hz = 2.50e-11 THz
The factor is rounded for display; the figure above is computed from the full value.
Hertz to terahertz conversion table
| Hertz | Terahertz |
|---|---|
| 1 Hz | 1.00e-12 THz |
| 2 Hz | 2.00e-12 THz |
| 3 Hz | 3.00e-12 THz |
| 4 Hz | 4.00e-12 THz |
| 5 Hz | 5.00e-12 THz |
| 6 Hz | 6.00e-12 THz |
| 7 Hz | 7.00e-12 THz |
| 8 Hz | 8.00e-12 THz |
| 9 Hz | 9.00e-12 THz |
| 10 Hz | 1.00e-11 THz |
| 12 Hz | 1.20e-11 THz |
| 15 Hz | 1.50e-11 THz |
| 20 Hz | 2.00e-11 THz |
| 25 Hz | 2.50e-11 THz |
| 50 Hz | 5.00e-11 THz |
| 100 Hz | 1.00e-10 THz |
| 200 Hz | 2.00e-10 THz |
| 300 Hz | 3.00e-10 THz |
| 500 Hz | 5.00e-10 THz |
| 1000 Hz | 1.00e-9 THz |
| 2000 Hz | 2.00e-9 THz |
| 5000 Hz | 5.00e-9 THz |
| 10000 Hz | 1.00e-8 THz |
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 terahertz?
A trillion hertz. Visible light runs from about 400 THz at the red end to 790 THz at the violet, which is the band a wavelength in nanometers is really describing.
How many terahertz are in a hertz?
One hertz is 1.0000 × 10^-12 terahertz. Going the other way, one terahertz is 1000000000000 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
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- Rule Calculator. (2026). Convert Hertz to terahertz. Rule Calculator. https://rulecalculators.com/convert/hertz-to-terahertz
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- Chicago
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Questions people actually ask
- How many terahertz are in a hertz?
- 1.0000 × 10^-12. A trillion hertz. Visible light runs from about 400 THz at the red end to 790 THz at the violet, which is the band a wavelength in nanometers is really describing.
- How do I convert terahertz back to hertz?
- Divide by 1.0000 × 10^-12, or multiply by 1000000000000 — they are the same operation.
Other frequency conversions
Terahertz to hertz — the same conversion the other way.