Hertz to Kilohertz
The hertz is the SI unit of frequency, one cycle per second, used for sound pitch, electrical current, and CPU clock speed. A kilohertz is 1,000 hertz, used to describe audio sample rates and AM radio broadcast frequencies. 1 Hz equals 0.001 kHz, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to frequency, measured here against frequency's base unit (Hz) — every other frequency unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
kHz = Hz × 0.001
Hz = kHz × 1,000
Worked example: 5 Hz × 0.001 = 0.005 kHz.
Conversion table
| Hertz (Hz) | Kilohertz (kHz) |
|---|---|
| 1 Hz | 0.001 kHz |
| 2 Hz | 0.002 kHz |
| 3 Hz | 0.003 kHz |
| 5 Hz | 0.005 kHz |
| 10 Hz | 0.01 kHz |
| 20 Hz | 0.02 kHz |
| 25 Hz | 0.025 kHz |
| 50 Hz | 0.05 kHz |
| 100 Hz | 0.1 kHz |
| 250 Hz | 0.25 kHz |
| 500 Hz | 0.5 kHz |
| 1,000 Hz | 1 kHz |
Frequently asked
- How many Kilohertz in a hertz?
- 1 Hz equals 0.001 kHz.
- How do I convert Hertz to Kilohertz?
- Multiply the value in Hz by 0.001 to get kHz. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Hertz and Kilohertz are both defined by a fixed conversion factor to frequency's base unit (Hz), so the result shown is exact to the precision displayed, not an approximation.