Hertz to kilohertz
Multiply hertz by 0.001 to get kilohertz.
10,000 Hz = 10 kHz
How to convert hertz to kilohertz
The kilohertz is one thousand hertz (10³ Hz). The hertz is the SI unit of frequency, one cycle per second.
Worked example — 10,000 Hz: 10,000 × 0.001 = 10 kHz.
Hertz to kilohertz table
| Hertz | Kilohertz |
|---|---|
| 100 Hz | 0.1 kHz |
| 440 Hz | 0.44 kHz |
| 1,000 Hz | 1 kHz |
| 5,000 Hz | 5 kHz |
| 10,000 Hz | 10 kHz |
| 20,000 Hz | 20 kHz |
| 44,100 Hz | 44.1 kHz |
| 48,000 Hz | 48 kHz |
| 100,000 Hz | 100 kHz |
Reverse and related
About hertz and kilohertz
Hertz (Hz)
1 Hz = 0.001 kHzDefinition. The SI unit of frequency, one cycle per second
History and origin
The hertz is the SI unit of frequency, one cycle per second, named after Heinrich Hertz, who first produced and detected radio waves in the 1880s. It replaced the older term cycles per second.
Current use
Hertz measure screen refresh rates, audio pitch and the frequency of mains electricity.
Source: BIPM SI Brochure (2019); ISO 80000-3
Kilohertz (kHz)
1 kHz = 1,000 HzDefinition. One thousand hertz (10³ Hz)
History and origin
The kilohertz is one thousand hertz, a convenient multiple for sound and radio. It became familiar through AM radio tuning and audio sampling.
Current use
Kilohertz are used for audio sample rates and AM radio frequencies.
Source: BIPM SI Brochure (2019); ISO 80000-3
Where people use this
Hertz: refresh rates, audio, mains power. Kilohertz: audio sample rates, radio. 44 100 Hz (CD audio) is 44.1 kHz.
Every value is carried to full double precision; the display is rounded.
Both units are defined in BIPM SI Brochure (2019); ISO 80000-3.
Questions people ask
How many kHz is 44,100 Hz?
44,100 Hz (CD audio) is 44.1 kHz.
How many Hz in a kHz?
One kilohertz is 1000 hertz.
How many kHz is 20,000 Hz?
20,000 Hz (the top of human hearing) is 20 kHz.