Convert hertz to kilohertz instantly. Enter a value below, or use the formula and reference table further down the page.
In practice
Hertz to kilohertz divides by 1,000. Hertz measures cycles per second, so audio and radio use the larger units: the human ear hears roughly 20 Hz to 20 kHz, concert pitch A is 440 Hz, and FM radio is broadcast in megahertz. Mains electricity cycles at 50 Hz in most of the world and 60 Hz in the US and parts of Asia, which is why appliances can differ by region. Use kilohertz for the upper audio range, such as 44.1 kHz CD sampling.
How to convert hertz to kilohertz
Multiply the value by 0.001.
kHz = Hz × 0.001Example: 10 Hz = 0.01 kHz.
Hertz to Kilohertz conversion table
| Hertz (Hz) | Kilohertz (kHz) |
|---|---|
| 1 Hz | 0.001 kHz |
| 2 Hz | 0.002 kHz |
| 3 Hz | 0.003 kHz |
| 4 Hz | 0.004 kHz |
| 5 Hz | 0.005 kHz |
| 10 Hz | 0.01 kHz |
| 15 Hz | 0.015 kHz |
| 20 Hz | 0.02 kHz |
| 25 Hz | 0.025 kHz |
| 50 Hz | 0.05 kHz |
| 100 Hz | 0.1 kHz |
Frequently asked questions
How many kilohertz is 1 hertz?
1 hertz equals 0.001 kilohertz.
What is the formula to convert Hz to kHz?
To convert Hz to kHz, multiply the value by 0.001. The full formula is: kHz = Hz × 0.001.
How do I convert kilohertz back to hertz?
Use the same calculator above and type your value into the kilohertz field instead — it converts in both directions. Or use the reverse formula: Hz = kHz ÷ 0.001.
Is the Hz to kHz conversion exact?
The conversion factor used here (0.001) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.