On-line Student Loan Calculators
You should use these calculators to get estimates of your federal student loan payments under different repayment plans. You should use these resources even if you don’t know your exact loan balance or monthly income. You can fill in the blanks with the best information you have and get estimates of monthly payment amounts.
Department of Education Repayment Estimator
IBRInfo web site Income Driven Repayment Calculator
Paying for College
CFPB Financial Aid Comparison Shopper (including a military benefit calculator)
Expected Family Contribution (EFC)