Antenna Length Calculator

This Antenna Length Calculator helps you determine the approximate length of a half-wave dipole antenna for a given operating frequency.

A dipole antenna is one of the simplest and most effective antennas used in amateur radio and other radio applications.

By entering the frequency in megahertz (MHz), the calculator will provide the recommended length in feet (and optionally meters), allowing you to build an antenna that is tuned for optimal performance at your chosen frequency.

Keep in mind that this calculation assumes a standard half-wave dipole in free space. Factors such as antenna height above ground, nearby objects, and the type of conductor may slightly change the actual resonant length. For best results, fine-tuning your antenna with an antenna analyzer or SWR meter is recommended.