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.
Wire is often near 95%. Coax-fed elements are lower.
Dipole Formula
These are the sizing relationships used by this calculator.
Wavelength
lambda (m) = 299.792458 / f(MHz) * VFTotal Dipole Length
Total length = lambda / 2Each 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 velocity 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.