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Student Loan Calculator

A standard installment calculator for student loans. Enter remaining balance, interest rate, and term to get monthly payment, total interest, and payoff date. It does not model income-driven federal plans or forgiveness; those require official studentaid.gov tools.

Principal left to repay. Must be greater than zero.

Annual percentage rate. 0% is allowed.

Remaining repayment length in the unit selected below.

Term unit

10 years and 120 months are the same term.

Used to estimate the payoff date. Defaults to today.

Payment estimate

Monthly payment
$397.95
Number of payments
120
Total interest
$12,754.34
Total paid
$47,754.34

Simple principal-and-interest estimate. Not a federal plan quote, not IDR or PSLF, and not a refinance offer.

Frequently asked questions

How is the payment calculated?

Same amortizing formula as other installment loans: M = P × r(1+r)^n / ((1+r)^n − 1).

Does this include IDR or PSLF?

No. Income-driven plans and Public Service Loan Forgiveness use federal rules. Use StudentAid.gov for those.

Can I enter multiple loans?

This version is one loan. Sum balances or run it once per loan.

Is this a refinance quote?

No. Enter a rate you were quoted. This page does not pull lender rates.

Subsidized vs unsubsidized?

Payment math is the same once repayment starts. Interest accrual in school is not modeled here.

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