Antenna Calculator
Calculate element lengths for dipoles, verticals, and ground planes. 0.95 velocity factor applied.
MHz
Half-Wave Dipole
Total length
10.03 m
32.9 ft
Each leg: 5.01 m (16.4 ft)
Quarter-Wave Vertical
Radiator length
5.01 m
16.4 ft
Full Wavelength
Loop / reference
20.06 m
65.8 ft
Notes: Calculations use a 0.95 velocity factor for typical wire antennas. Actual length depends on wire gauge, height above ground, and nearby objects. Cut slightly long and trim to resonance with an antenna analyzer.