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Electrical / RF
Quarter-Wave Antenna Calculator
Calculate theoretical full-, half- and quarter-wave electrical lengths from frequency.
Frequency and medium
Theoretical antenna lengths
Quarter wavelength74.948115 cm
Velocity factor 1
- Full wavelength
- 2,997.92458 mm · 299.792458 cm · 2.997925 m · 118.028527 in · 9.835711 ft
- Half wavelength
- 1,498.96229 mm · 149.896229 cm · 1.498962 m · 59.014263 in · 4.917855 ft
- Quarter wavelength
- 749.481145 mm · 74.948115 cm · 0.749481 m · 29.507132 in · 2.458928 ft
These are theoretical electrical lengths. Element diameter, end effects, surroundings and construction require real-world tuning.