Antenna cutting calculator. Ham Radio HF/VHF Antenna Lengths Chart. Feb 9, 2026 · This calculator helps you determine the physical length to cut an antenna for a specific radio frequency. We present the basic theory and rigorously validated calculators to analyze and design numerous antenna types and related components. Jan 27, 2026 · Use our free 1/4 antenna calculator to determine the precise length for your quarter-wave whip or ground plane antenna. The results are convenientlydisplayed in inches, centimeters, feet and meters. You only need to type in the numbers in the Cyan boxes. This calculator is designed to give the vertical length (height) of a particular whip type antenna, or the frequency of it. All antenna lengths in the information below are in feet and are the results based on the standard formula of 468 / FMhz = total length in feet. Loop antenna lengths are based on using 1005 / FMhz = total loop length in feet. The most widely used formula to calculate the approximate overall length of wire required for a dipole is: 468 / frequency (MHz) = length of wire in feet. This antenna wavelength calculator can be used to determine the physical length of an antenna’s electromagnetic wave in free space. Quarter-wave matching section lengths are also calculated. This calculator assumes propagation in a free Quick SWR Calculator for Vertical and Dipole Ham Radio Antennas Here’s a really simple way of double checking how to much to trim your antenna elements. Without this calculation, your antenna may be ineffective or suffer from poor signal transmission and reception. Here is a handy chart for determing 1/4 wave verticals, 1/2 wave dipoles, and full wave loop lengths. Explore a variety of online antenna calculators for designing and calculating antenna dimensions. What type of antenna do you want to build?. The Wire Size can range from 16 AWG to 12 AWG. 1. ) Dec 31, 2025 · This calculator helps you estimate the correct lengths for common amateur-radio antennas (dipoles, verticals, EFHW, Inverted-V, trap and fan dipoles, W3DZZ, etc. This form All you need to do is enter the desired resonant (center) frequency in the form below, then click "Calculate". The correct lengths for the various models will be displayed in the chart. Theantenna calculator above uses this formula as a starting point tocalculate wire lengths for the dipole. Professional antenna calculators for ham radio operators. For Dipoles: Cut / Add the result to each leg For Verticals: Cut / Add result to your vertical radiator Dipole Antenna Calculator The measurements below are for building a simple Dipole Antenna. The calculation is based on the fundamental relationship between frequency, wavelength, and the speed of light. We strive to ensure the accuracy and updating of the information and calculations provided, but we make no warranties or The total dipole antenna length and the length of each dipole part can be obtained by using this calculator by just using the desired frequency of operation. As with any antenna, lengths Use this online calculator to determine the length of a quarter-wave antenna from the frequency. The calculator guides you in selecting dimensions, spacing, and configurations, helping antennas maintain consistent performance across multiple channels or bands. Includes frequency-to-wavelength conversion. Free tools with guides. This can be useful for determining antenna ground plane requirements, antenna spacing requirements to prevent coupling in for multi-antenna systems, or other situations where the antenna’s wavelength is needed. Find tools for building log periodic, vertical, Yagi, loop, and more antennas. Calculate dipole, vertical, EFHW, J-pole, ground plane, loop, and five-eighths-wave antenna dimensions in feet and meters. Oct 7, 2024 · A half-wave dipole calculator simplifies the process by allowing you to input your desired frequency and instantly determine the optimal length of the antenna. The Balun matches the Balanced Antenna into the Unbalanced Use this online calculator to determine the length of a full-wave loop antenna from the frequency. Free antenna length calculator for amateur radio. Dec 11, 2025 · The Antenna Calculator aims at delivering a comprehensive and practical tool to Antenna Engineering students and practitioners. The larger the wire, the wider the bandwidth. Design magnetic loop and dipole antennas with accurate calculations. Place a 1:1 Balun on the Antenna end of the Feedline. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. (To better understand the variables be sure to read the application notes and study the drawings, following. ), taking into account shortening factors, insulation, and even feedline effects. Both metric and English units of measurement are supported. gob dfe vqj gyn mmn tmx zod lft tev gdf tzz hvq sgv idb ccq