Your student loan lender’s website will usually offer the best loan repayment calculators corresponding to their repayment plans.

The following websites offer generic calculators on repayment, calculating interest, and general loan management.

FinAid.org http://www.finaid.org/calculators/

Mapping Your Future http://mappingyourfuture.org/paying/standardcalculator.htm

CNN Money http://money.cnn.com/

BankRate.com (loans) http://www.bankrate.com/brm/popcalc2.asp

BankRate.com (credit cards) http://www.bankrate.com/brm/calc/creditcardpay.asp