Convert Hertz to Kilohertz (Hz to kHz)
1 hertz (Hz) = 0.001 kilohertz (kHz). 1 kHz = 1000 Hz. Example: 20000 Hz = 20000 × 0.001 = 20 kHz.
Also searched as hertz to kHz, hertz in kHz, hertz into kilohertz, Hz to kHz, Hz in kilohertz, Hz into kilohertz, hertz to kilohertz, Hz to kilohertz converter and how many kilohertz in a hertz.
1 Hz = 0.001 kHz
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk hertz to kilohertz converter to paste a column from Excel.
How to Convert Hertz to Kilohertz
- 1 Hz = 0.001 kHz
- 1 kHz = 1000 Hz
- Example: convert 20000 Hz to kHz: 20000 Hz = 20000 × 0.001 kHz = 20 kHz
Formula
kHz = Hz ÷ 1000
Derivation from SI units:
- 1 Hz = 1 s⁻¹, one cycle per second.
- 1 kHz = 10³ Hz.
Both units are defined exactly, so the factor is exact. Hertz definition: hertz; Kilohertz definition: kilohertz.
Worked examples
- 20000 Hz is 20 kHz.
20000 Hz × 0.001 = 20 kHz - A 1000 Hz test tone is 1 kHz.
1000 Hz × 0.001 = 1 kHz
Hertz to Kilohertz conversion table
| Hertz (Hz) | Kilohertz (kHz) |
|---|---|
| 1 Hz | 0.001 kHz |
| 10 Hz | 0.01 kHz |
| 50 Hz | 0.05 kHz |
| 60 Hz | 0.06 kHz |
| 100 Hz | 0.1 kHz |
| 440 Hz | 0.44 kHz |
| 1000 Hz | 1 kHz |
| 20000 Hz | 20 kHz |
Where it's used
Frequencies in hertz are converted to kilohertz for audio specifications, PWM settings and radio dials. Divide by 1000.
Hertz to other frequency units
| Conversion | 1 Hz equals |
|---|---|
| hertz to kilohertz | 0.001 kHz |
| hertz to megahertz | 0.000001 MHz |
| hertz to gigahertz | 1 × 10⁻⁹ GHz |
| hertz to revolution per minute | 60 rpm |
| hertz to radian per second | 6.283185307 rad/s |
| hertz to revolution per second | 1 rps |
| hertz to degree per second | 360 °/s |
| hertz to beat per minute | 60 bpm |
Show 1 more units
| hertz to terahertz | 1 × 10⁻¹² THz |
|---|
Frequently asked questions
What is the range of human hearing?
About 20 Hz to 20,000 Hz (20 kHz), narrowing with age.
How many kilohertz are in 1 hertz?
1 Hz = 0.001 kHz.
How do I convert hertz to kilohertz?
Multiply the value in Hz by 0.001, or divide it by 1000. For example, 20000 Hz × 0.001 = 20 kHz.
Is the Hz to kHz conversion exact?
Yes. Both units are defined exactly, and 1 Hz is exactly 0.001 kHz.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Hertz to Kilohertz (Hz to kHz). Retrieved October 25, 2026, from https://scientificconverters.com/frequency/hertz-to-kilohertz/
IEEE
Scientific Converters, "Convert Hertz to Kilohertz (Hz to kHz)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/frequency/hertz-to-kilohertz/