Overall wire length
32 ft 11 in32.96 ft · 10.05 mAmateur radio tools
Dipole Calculator
Use this free dipole antenna length calculator to find total wire length and each leg in feet and meters. Enter your frequency in MHz or choose a common ham radio band.← View all public tools468 ÷ frequency (MHz) Feed point16 ft 6 in16 ft 6 in
Center-fed half-wave
Enter your operating frequency
Choose a common band or enter the exact frequency where you want the antenna centered.
Each side of center
16 ft 6 in16.48 ft · 5.02 mBuild and tune
This result is a practical starting length for a center-fed half-wave wire dipole. Cut each side a little long, install the antenna in its intended location, then trim both sides equally while checking SWR. Wire insulation, nearby objects, height, and installation shape can shift resonance.
Keep antennas and feed lines well clear of power lines. Use appropriate support, strain relief, grounding, and lightning protection.