Quarter-wave vertical antenna length calculator
If you're designing and building a quarter-wave vertical antenna, you'll find this calculator a handy, useful tool for your next project. Views expressed in this post are those of the reporters and correspondents. Accessed on 13 October 2026, 1447 UTC. Content and source: "Vertical Antenna Calculator." https://www.66pacific.com/calculators/quarter-wave-vertical-antenna-calculator.aspx Please check URL or scroll down to read your selections. Thanks for joining us today. Russ Roberts (KH6JRM/AL0HA). https://arrlnewshawaii.blogspot.com. https://simplehamradioantennas.blogspot.com. Quarter-Wave Vertical Antenna Length Calculator A quarter-wavelength antenna is easy and inexpensive to build and can be an effective antenna with a low angle of radiation (that is, power is radiated out, not up). The formula for calculating the approximate length of a quarter-wave vertical antenna is: Quarter-wavelength in feet: 234 / frequency in MHz Quarter-wavelength in meters: 71.5 / fr...