The wavelength (in m) of a periodic wave is equal to the velocity of the wave (in m/s) divided by the frequency (in Hz). When talking about radio waves (electromagnetic radiation) that velocity is the speed of light, or 299792458 meters per second. Given a frequency of 93.7 MHz, or 93700000 Hz, the wave length is 299792458/93700000, or 3.1994926m.
