Antenna cutting length
Starting dimensions for common wire and vertical antennas.
Total starting length--
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Ham Radio Antenna Length Calculator
Calculate starting lengths for dipoles, quarter-wave verticals, 5/8-wave elements and full-wave loops.
About this calculator
How to use it
Select an antenna type and frequency to obtain a practical starting dimension with an adjustable end-effect factor.
Understanding the result
Build slightly long and trim while measuring the antenna in its final position. Nearby objects, element diameter and height affect resonance.
More ham radio calculators
Use this calculator as a practical starting point. Check critical radio, electrical and installation work with suitable test equipment and current licence requirements.