EA4FSI TOOLS

Coax Loss Calculator

Calculate coaxial cable attenuation, efficiency and power delivered to the antenna.

Coaxial cable

Frequency (MHz) Enter the operating frequency in MHz.

Cable length

Transmitter power (W) — optional Leave blank if you only want cable attenuation and efficiency.

Cable data is embedded in this PHP file; no external API or database is used. Branded cables use manufacturer-published attenuation figures or equations. The RG-213 entry is specifically Belden MRG2130 rather than a generic value for every cable sold as RG-213.

Cable attenuation data

Run a calculation above to display the attenuation data for the selected cable.

All-cable attenuation comparison

Run a calculation above to compare all cables at the selected frequency.

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