http://finemos.analogeda.com/

Do the calculations of a single MOS transistor for you. As an initial version, the functions implemented includes:
1, given id and the bias, calculate the width
2, given vdsat, calculate Vg (gate voltage)
3, given id and vdsat, calculate width and Vg.

Prerequisite: Linux, Cadence

Three steps to use FineMOS:
1, Download the client-side program, discompress it and run the client-side program "finemos";
2, Follow the steps in the client-side program and authorize it to access your data for FineMOS;
3, Open the FineMOS user interface using your web browser, fill in the parameters you want to calculate.

Have fun.