Megahertz to Kilohertz Converter

Frequency counts how often something repeats each second, and its SI unit is the hertz (Hz) — one cycle per second, named after Heinrich Hertz and once simply called “cycles per second.” The scale climbs by factors of a thousand: kilohertz (kHz) for audio, megahertz (MHz) for radio and older processors, gigahertz (GHz) for Wi-Fi and modern CPUs, and terahertz (THz) for light and advanced electronics. Rotational speed is the same idea applied to spinning things: revolutions per minute (rpm) for engines, motors and disks, where 1 Hz equals 60 rpm. In physics the angular frequency ω is measured in radians per second and relates to ordinary frequency by ω = 2πf, so 1 Hz is 2π ≈ 6.2832 rad/s; degrees per second is the same quantity in degrees. Media and everyday life add their own: frames per second (fps) for video and gaming, and beats per minute (BPM) for music tempo and heart rate, so 120 BPM is 2 Hz. One thing this converter does not include is the period — the time for a single cycle, in seconds — because it is the reciprocal of frequency (a 50 Hz supply has a 20-millisecond period), not a simple multiple. Every unit here is stored as its exact number of hertz, so any conversion is just the input turned into hertz and then into the unit you want.