Of course, as far as the calculators are concerned, it generally makes no difference whether you have a regular credit card, a secured credit card, a store card, or even a gas card. This will become obvious after a quick look at the credit card calculators themselves, as there is no place to input such distinctions.
What's more, just think: Would the monthly payments required to pay off a $5,000 balance on a Macy's Card be any different than those needed to pay off the same balance on a Visa card? Definitely not.
There is, however, one exception: charge cards. You're not going to be able to calculate the cost of interest or the time it will take you to pay down debt for a card that does not allow you to revolve a balance, after all.