VSWR / Return Loss Converter
Enter the known values and run the calculation.
Overview
Convert between common mismatch metrics such as VSWR and return loss.
This converter moves between the common mismatch terms used in RF bench work: VSWR, return loss, reflection coefficient, and mismatch loss.
It helps when a network analyzer, cable spec, antenna datasheet, or test procedure uses one term and the next decision in the workflow expects another.
The math and how it's used
The calculations use the standard relationships between reflection coefficient magnitude, VSWR, and return loss.
Mismatch loss is calculated from -10 log10(1 - gamma^2) so you can see the real power penalty implied by the mismatch.
This is a quick mismatch-translation tool for moving between VSWR, return loss, reflection coefficient, and delivered power.
It is most useful at the bench when one instrument reports return loss and another part of the discussion is happening in VSWR. The result still assumes a simple steady-state transmission-line view.
Bench use
This is useful for cable checks, antenna troubleshooting, front-end matching work, and explaining analyzer readings to people who are more used to datasheet language.
A low VSWR does not by itself guarantee a good system. Cable loss, power handling, connector condition, and frequency range still matter.