The calculator below uses JavaScript to provide quick computation of the Fresnel equations. To learn the concepts represented by this plot, please view the Fresnel equation description page.

It is worth noting these calculations assume a specific right-handed coordinate system for incident, transmitted, and reflected rays. In particular, phase values may not agree with other sources which use different conventions.

Software download

Open-source code and test cases are provided for a few programming languages commonly used in optical science and engineering.

Note: To keep this webpage focused on the calculator, the math and discussion have been removed. I am happy to discuss these results further, and the code for these pages is commented, so take a look or ask me a question.