Dipole Antenna Length
Calculate half-wave dipole total length and leg length for any amateur radio frequency.
Half-Wave Dipole
The standard wire dipole. Total length is approximately one half wavelength, split into two equal legs with the feed point in the center.
Accounts for the typical shortening of a resonant element. Actual length varies with conductor
and installation.
Dipole Formula
These are the sizing relationships used by this calculator.
Wavelength
lambda (m) = 299.792458 / f(MHz)Total Dipole Length
Total length = lambda / 2 * (Length factor (%) / 100)Each Leg
Each leg = Total length / 2FAQ
What does this dipole calculator return?
It returns the total half-wave dipole length and the length of each leg using the entered frequency and length factor.
Should I cut the dipole exactly to the calculated value?
No. Cut slightly long, install it in the intended configuration, and trim in small steps while measuring resonance.