This calculator calculates either:

The monthly payment amount required to repay your credit card balance in full, given your estimated monthly purchases and number of months you’d like to pay off your balance.

OR

The number of months it will take to pay your credit card balance in full, given the monthly payment amount you plan to make, along with your estimated monthly purchases.

When estimating your monthly charges, be sure to include any annual fees or other fees charged by the card issuer.