Online Personal Finance Calculators

I've said this before, I love the wide variety of online personal finance calculators there are out there to save us everyday folk time. They save people like you and me from breaking out something like this...
Here are three more to add to the list of handy time savers. This group covers the value of your college education, taxation of bonuses and whether you should exercise stock options.

How much is your graduate education worth? This calculator takes what you expect to make before, after, years till retirement and the cost of your education into account. I personally like it because it shows you the break even point to where your education has paid for itself.

What will my bonus net after taxes? This calculator is pretty straightforward, it takes your bonus amount, income, deductions and allowances to determine how much you will get and how much Uncle Sam keeps for himself.

Should I exercise "in the money" options? With obvious shortcomings - since there is no way for the calculator to know if your company is in a downward spiral - this calculator will attempt to give you a good idea about whether or not you should exercise those options floating around in your portfolio (if you are fortunate enough to have some).