Convert between hertz, kilohertz, megahertz, gigahertz, and more. Use this free online frequency converter to convert between Hertz, Kilohertz, Megahertz, Gigahertz, Revolutions per Minute and more. Formula: 1 kHz = 1000 Hz | 1 MHz = 1000 kHz | 1 GHz = 1000 MHz