As a financial advisor, I used this information daily for over 25 years.  At the time, I had a wealth of resources available to me, making the financial calculations quite easy.  Now retired, I was looking for a convenient "cheat sheet" that I could keep by my desk as I evaluate my own personal finance situation.  This six page guide is one of the most comprehensive low cost tools that I have ever used. It is well organized, easy to read, and simple to use.  I now carry it with me in a portfolio I use almost daily, and would not want to be without it.  Does it do everything my financial calculator can do? No, of course not.  It does, however, meet my needs most of the time.  As a member of several investment groups, it helps answer a lot of questions, enough so I need not carry my HP 12c with me all the time. Highly recommended.