Convert Hertz to Kilohertz
1 hertz is 0.001 kHz. One hertz is exactly 0.001 kilohertz.
One hertz is 0.001 kilohertz. To convert hertz to kilohertz, multiply by 0.001; to go the other way, divide by 0.001 or multiply by 1000. The factor is exact rather than rounded: it follows from NIST Special Publication 811. One cycle per second.
Factor checked against the defining standard · How we check
- Hertz × 0.001
1 * 0.0010.001 kHz
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 kilohertz? The converter and the working
- 1.Take the measurement in hertz.
- 2.Multiply by 0.001 — that is how many kilohertz fit in one hertz.
- 3.To go back the other way, divide by 0.001, or multiply by 1000.
Worked example: 25 hertz to kilohertz
- Formula
- Hz × 0.001 = kHz
- Arithmetic
- 25 × 0.001 = 0.03 kHz
- Answer
- 25 Hz = 0.03 kHz
The factor is exact, so this figure is exact too — only the display is rounded.
Hertz to kilohertz conversion table
| Hertz | Kilohertz |
|---|---|
| 1 Hz | 0.001 kHz |
| 2 Hz | 0.002 kHz |
| 3 Hz | 0.003 kHz |
| 4 Hz | 0.004 kHz |
| 5 Hz | 0.01 kHz |
| 6 Hz | 0.01 kHz |
| 7 Hz | 0.01 kHz |
| 8 Hz | 0.01 kHz |
| 9 Hz | 0.01 kHz |
| 10 Hz | 0.01 kHz |
| 12 Hz | 0.01 kHz |
| 15 Hz | 0.02 kHz |
| 20 Hz | 0.02 kHz |
| 25 Hz | 0.03 kHz |
| 50 Hz | 0.05 kHz |
| 100 Hz | 0.1 kHz |
| 200 Hz | 0.2 kHz |
| 300 Hz | 0.3 kHz |
| 500 Hz | 0.5 kHz |
| 1000 Hz | 1 kHz |
| 2000 Hz | 2 kHz |
| 5000 Hz | 5 kHz |
| 10000 Hz | 10 kHz |
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 kilohertz?
A thousand hertz. AM radio is broadcast here — 540 to 1600 kHz — and audio sampling is quoted in it: a CD samples at 44.1 kHz.
How many kilohertz are in a hertz?
One hertz is 0.001 kilohertz, exactly. Going the other way, one kilohertz is 1000 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 kilohertz. Rule Calculator. https://rulecalculators.com/convert/hertz-to-kilohertz
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- "Convert Hertz to kilohertz." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/hertz-to-kilohertz.
- Chicago
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Questions people actually ask
- How many kilohertz are in a hertz?
- 0.001. A thousand hertz. AM radio is broadcast here — 540 to 1600 kHz — and audio sampling is quoted in it: a CD samples at 44.1 kHz.
- How do I convert kilohertz back to hertz?
- Divide by 0.001, or multiply by 1000 — they are the same operation.
Other frequency conversions
Kilohertz to hertz — the same conversion the other way.