The megahertz (MHz) equals one million hertz, widely used for radio frequency bands, early CPU clock speeds, and wireless communication standards. FM radio broadcasts in the 88–108 MHz range, while early personal computers operated at just a few MHz. One megahertz equals 1,000,000 cycles per second.

Revolutions per second (rps) measures rotational speed as complete turns per second, equivalent to exactly one hertz. While less common than rpm in everyday specifications, rps is used in physics, engineering analysis, and some industrial equipment ratings. One rps equals exactly 60 rpm.