Convert hertz to kilohertz
Converting hertz to kilohertz is a common frequency task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 Hz equals 0.001 kHz, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert hertz to kilohertz
To convert hertz to kilohertz, multiply the number of hertz by 0.001. For example, 10 Hz × 0.001 = 0.01 kHz.
kHz = Hz × 0.001
- Write down the value in hertz you want to convert.
- Multiply it by 0.001 (the exact Hz→kHz factor).
- The result is your value in kilohertz. Check it below with the converter or the table.
Conversion table
Common values of hertz and their equivalents in kilohertz:
| Hz | kHz |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
About these units
Hertz (Hz). The hertz is the SI unit of frequency: one cycle per second. It is named after Heinrich Hertz and measures everything from mains electricity (50–60 Hz) to musical pitch.
Kilohertz (kHz). A kilohertz is 1,000 hertz. AM radio broadcasts sit around 500–1,700 kHz, human hearing spans roughly 20 Hz to 20 kHz, and audio sample rates are quoted in kHz.
Frequently asked questions
How do I convert hertz to kilohertz?
To convert hertz to kilohertz, multiply the number of hertz by 0.001. For example, 10 Hz × 0.001 = 0.01 kHz. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many kilohertz are in 1 hertz?
1 Hz = 0.001 kHz. That is the fixed relationship used by this converter and by international standards.
How many hertz are in 1 kilohertz?
1 kHz = 1,000 Hz. If you are converting in the opposite direction, use our Kilohertz to Hertz converter for the dedicated table and FAQ.
Is the hertz to kilohertz conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.001 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is hertz used for?
The hertz is the SI unit of frequency: one cycle per second. It is named after Heinrich Hertz and measures everything from mains electricity (50–60 Hz) to musical pitch.