Student Loan Calculator — payment, payoff date, total interest.
Student Loan Calculator
Estimate your monthly payment, payoff date, and total interest over the life of a student loan.
Loan details
Loan snapshot
How student loan repayment works
Student loans typically use a fixed monthly payment structure based on the principal amount, interest rate, and repayment term. A standard amortization formula estimates what your monthly payment should be if you repay the balance over the loan term.
Even modest extra payments can significantly reduce the total interest paid and shorten the payoff date, because every extra dollar reduces the outstanding balance sooner.
Your actual borrower experience may vary depending on federal repayment plans, private lender terms, deferment status, and whether your loan is subsidized or unsubsidized.
- Longer loan terms reduce monthly payment but increase total interest.
- Extra payments reduce principal faster and can shorten the payoff period.
- Interest accrues monthly, so even small changes in rate matter.
- Federal and private student loans can have different repayment rules.
Frequently asked questions
What does this calculator estimate?
It estimates the monthly payment, payoff date, total interest, and total amount paid based on the loan amount, interest rate, term, and any extra monthly payment.
How is the monthly payment calculated?
This uses a standard fixed-rate amortization formula with the interest rate divided by 12 months and the repayment term converted to monthly payments.
Does extra payment really help?
Yes. Extra payments reduce the principal faster, which lowers future interest charges and can significantly shorten the payoff timeline.
Does this include fees or penalties?
No. This estimate focuses on principal, rate, and repayment schedule and does not include lender fees, deferment periods, penalties, or forgiveness programs.
What if I have a federal repayment plan?
Federal plans may include income-driven options, deferment, or forgiveness. This calculator is best used as a general estimate rather than a final repayment plan.
Is this a guaranteed repayment schedule?
No. This is an educational estimate only and does not guarantee final lender terms, repayment eligibility, or total repayment costs.