Hi Vicky.
Unfortunately the way you've done it is not legal, since you have used CalcTool code for pages on your own site. To be legal, you either need to make the link go to the CalcTool website itself, or you need to get permission from me (as the copyright holder). By the way, the reason for the ads is to support the cost of the site hosting. It doesn't bring in much more than that, but without it, I would not only be writing and maintaining the site for free, but also paying for its upkeep!
Anyway, I can see what you're trying to do, and I think we can sort it out in a way that will suit you. I will send you a personal message to discuss it further.
Andy