Frequency Converter
Convert frequency units with the factor behind each answer.
1 kHz = 1,000 Hz
Common conversions
- 1 Hz = 0.001 kHz
- 1 kHz = 1,000 Hz
- 1 MHz = 1,000 kHz
- 1 MHz = 1,000,000 Hz
Mains frequency
Mains is 50 Hz in most of the world and 60 Hz in the Americas and parts of Asia. Equipment rated for one may not be suitable for the other.
Related quantities
Angular frequency is ω = 2πf in radians per second. The synchronous speed of an AC machine is n = 120 f / p in rpm, where p is the number of poles: 50 Hz and 4 poles give 1,500 rpm.
Unit factors
Every unit in terms of the base unit shown. To convert, multiply by the factor of the unit you have and divide by the factor of the unit you want.
| Unit | Equals | What it is |
|---|---|---|
| Hz | 1 Hz | Hertz, cycles per second. Mains is 50 Hz or 60 Hz. |
| kHz | 1,000 Hz | Kilohertz. Switching and carrier frequencies. |
| MHz | 1,000,000 Hz | Megahertz. Radio and fast digital signals. |
| GHz | 1,000,000,000 Hz | Gigahertz. Wi-Fi, microwave and processor clocks. |
| THz | 1 × 10¹² Hz | Terahertz, a trillion hertz. Far-infrared and terahertz imaging. |
| rad/s | 0.1591549431 Hz | Radians per second, the SI unit of angular velocity. |
Conversion pages
Hz to kHzkHz to HzMHz to HzHz to MHz
Frequently asked questions
What is the formula to convert kHz to Hz?
Hz = kHz × 1,000. For example, 20 kHz is 20,000 Hz.
How do I convert Hz back to kHz?
kHz = Hz × 0.001. The Swap button above reverses the direction for any pair of units.
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