Coax Loss Calculator

RF Feedline (Coax and Ladder-Line) Loss and ERP Calculators

This page is Copyright © 2015 by KV5R. The Javascript that runs the loss calculator was written in 2001 by Dan Maguire, AC6LA, based on ARRL's "Additional Loss Due to SWR" formula. He later withdrew the code in favor of more accurate formulae. For more info, please see this AC6LA page.

This program is provided “AS-IS.” It is the responsibility of the user to verify the accuracy of the calculations when using this program. Always look up the cable manufacturers’ specifications and installation guides for any RF cable prior to purchase and use.

Please don’t ask me to add another coax! I don’t know where or how the K1 and K2 constants used in the arrays were obtained or derived.


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