Enter the reflected power and the forward power into the Calculator. The calculator will evaluate the Standing Wave Ratio.

## Standing Wave Ratio Formula

SWR = (1+SQRT(Pr/Pf)) / (1-SQRT(Pr/Pf))

Variables:

- SWR is the Standing Wave Ratio (())
- Pr is the reflected power
- Pf is the forward power

## How to Calculate Standing Wave Ratio?

The following steps outline how to calculate the Standing Wave Ratio.

- First, determine the reflected power.
- Next, determine the forward power.
- Next, gather the formula from above = SWR = (1+SQRT(Pr/Pf)) / (1-SQRT(Pr/Pf)).
- Finally, calculate the Standing Wave Ratio.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

reflected power = 35

forward power = 25