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Home - RF/Microwave Calculators & Conversions - VSWR / Return Loss Calculator

VSWR / Return Loss Calculator

Pasternack's VSWR/Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types.

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Select input type:

Result:
VSWR:
Reflection Coeff.:
Return Loss:
Mismatch Loss:

VSWR (pronounced "viswar"), or the Voltage Standing Wave Ratio, is the ratio of the maximum standing wave amplitude at one node to the minimum amplitude at another node in a system. In one typical RF application, VSWR is used to measure the amount of reflection due to impedance mismatch.

**Note: All of our calculators allow SI prefix input. For example, if you wish to input "25000000", just type "25M" instead. See the quick-reference table below for all compatible SI prefixes.
Prefix Symbol Value
Tera 'T' 1012
Giga 'G' 109
Mega 'M' 106
kilo 'k' 103
Prefix Symbol Value
pico 'p' 10-12
nano 'n' 10-9
micro 'u' 10-6
milli 'm' 10-3