Wire Antenna Calculator
Calculate wire length for dipole, vertical, loop, end-fed, and G5RV antennas by frequency and band. Includes height analysis.
Inputs
MHz
%
ft
Results
Total Wire Length
65.45 ft
Leg/Element Length
32.73 ft
Total Wire Length19.95 m
Leg/Element Length9.98 m
Wavelength130.68 ft
Wavelength39.83 m
Height (Wavelengths)0.27 λ
Est. Takeoff Angle74°
Antenna Type NameHalf-Wave Dipole
Band40m
How to Use This Calculator
- Enter your target operating frequency (MHz) — for example, 7.15 for the 40m band.
- Select the antenna type: half-wave dipole, quarter-wave vertical, full-wave loop, end-fed, or G5RV.
- Set the wire velocity factor (95% for bare copper, 93% for insulated wire) and antenna height (ft).
- Review total wire length (ft and m) and leg/element lengths for your chosen antenna type.
- Check estimated takeoff angle — higher antennas produce lower radiation angles for DX work.
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Formula
Dipole: L = 468/f; Vertical: L = 234/f; Loop: L = 1005/fRelated Calculators
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