Dipole Antenna Length Calculator
Dipoles antennas are easy to build and can be very effective when placed half a
wavelenth or more above ground.
Enter the desired operating frequency in megahertz to get a good starting length
for a dipole in both feet and meters.
The formula for calculating the approximate length of a dipole is:
Dipole length in feet: 468 / frequency in MHz
Dipole length in meters: 143 / frequency in MHz
These are only approximate values. In practice it's best to make the antenna
a little longer than the calculated value and then trim it to get the best SWR value.
Frequency in MHz:
Length of each element:
Total length of dipole:
The ARRL Antenna Book for Radio Communications