Our credit card comparison calculator is designed to help our visitors to compare the real long term costs associated with today's credit cards that have variable interest rates. When one tries a simple credit card comparison without "crunching the numbers" the annual fees, intro-rates and compounding intervals can sometimes be hard to interpret. To use the comparison calculator all you need to do is to enter the best guess at what your balance amount will be, a payment amount (usually 2% - 3%) and the differing features for each card, then click the "Compute" button. Please note: the credit card comparison calculator uses "fixed payments" (the same amount each month for all payments) to compare the costs of the credit cards. To be accurate, if you ever pay less than payment you enter, your true costs will vary in the results of this credit card comparison calculator.