How to Convert Hertz to Kilohertz (Hz to kHz)
Frequency conversions apply to radio stations, Wi-Fi bands and processor speeds. This guide shows how to convert hertz into kilohertz by hand, with examples and a quick-reference table.
The conversion
To convert hertz to kilohertz, multiply the value by 0.001. To go the other way, divide by the same number (or multiply by 1,000). For a quick estimate, multiply by about 0.001.
Kilohertz = hertz × 0.001
Worked examples
- 3 Hz = 0.003 kHz
- 12.5 Hz = 0.0125 kHz
- 75 Hz = 0.075 kHz
Hertz to Kilohertz table
| Hertz | Kilohertz |
|---|---|
| 1 Hz | 0.001 kHz |
| 2 Hz | 0.002 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 |
Common questions
Is Hz to kHz exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Kilohertz to Hertz converter.
Mistakes to avoid
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Background
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the Hertz to Kilohertz Converter or browse all frequency converters.
Run your own numbers: Hertz to Kilohertz Converter