I found such a nice website: Net Present Value calculator There you can calculate NPV

A good start is finding a web that calculates VAR: Value at Risk (VAR) Calculator

Es un buen comienzo localizar una web como esta: Value at Risk Calculator

Value at Risk (VAR) indicates how much, given a level of confidence and a time period, can you lose on an specific stock. We will try to argue the many issues that arise from this topic.

El Value at Risk o VAR supone una herramienta muy útil que nos permitirá calcular, dados un margen de confianza y un espacio temporal determinado, cuál es la pérdida máxima que puede darse en un determinad[...]

I found such a nice website: NPV calculator There you can calculate NPV