Convert frequency between hertz, kilohertz, megahertz, gigahertz, and revolutions per minute (RPM). Frequency describes how often something repeats, and it appears in radio and Wi-Fi channels, processor clock speeds, audio, and rotating machinery, each scaled to its own convenient unit. This converter uses exact powers of ten between the hertz units and treats RPM as one sixtieth of a hertz, since one revolution per minute is one cycle every sixty seconds. Pick the unit you have and the one you want, type a value, and the result updates live as you type. Whether you are reading a spec sheet or a motor rating, the answer is immediate. It runs entirely in your browser, so it is fast, private, and works offline after loading.