# Dipole Antenna Length Calculator

Use this calculator to find the dimensions of a Dipole antenna designed to operate at a specified wavelength. The wavelength is typically specified in meters or m.

As an example you might want to calculate the dimensions of a 40 meter dipole.

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

This calculator gives the length of a half wave dipole antenna. Enter the Frequency and the tool will compute the antenna length (L).

## Example Calculation

At a frequency of operation 1000 MHz, the dipole length (L) is 5.62 inches or 0.14 meters.

The dimensions are smaller than that of an antenna that operates at a lower frequency.

At a frequency of 100 MHz, the dipole length L is 56.4 inches or 1.4 meters.

## Formula

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

L = 468 / f

where f is the frequency in MHz.

The length of each arm of the dipole

l = L/2

## Table of Antenna Wavelength vs Antenna Length

The following table provides the physical antenna dimensions (length in feet) as a function of the wavelength.