Half Wave Dipole Antenna Length Calculator

A half-wave dipole antenna is comprised of two quarter-wavelength conductors placed end to end.

Use this calculator to determine the length of a half wave dipole from the frequency.

Enter the frequency and the tool will compute the antenna length (L).

Example Calculation

For an operating frequency of 2450 MHz, The dipole length (L) is 2.29 inches or 5.82 centimeters.


The total length (L) of the dipole antenna in feet is calculated as:

L = 468 / f

where f is the frequency in MHz.

The length of each arm of the dipole

l = L/2