Student Loan Calculator
Plan your student loan repayment.
All calculations happen locally in your browser — nothing is uploaded, stored or tracked.
Enter the total loan balance
All your student loans combined.
Set the rate
Weighted average of your loans' rates.
Choose the term
10 years is the federal standard.
What Is a Student Loan Calculator?
A student loan calculator estimates the standard monthly payment on an education loan. Student loans are amortized like other loans, but two features matter: interest often accrues during school (subsidized vs unsubsidized), and there are a variety of repayment plans.
The calculator models the standard 10-year plan (the default for federal loans) and lets you compare longer terms. It also shows the total interest, which is often eye-opening.
The Formula
Federal undergraduate rates are set by Congress each year; private rates depend on credit. Enter the rate on your loan — this site does not store or fetch current rates.
Your data never leaves your device.
Every calculation on this site runs in your browser using vanilla JavaScript. Nothing is uploaded, stored or tracked.
- 100% local, client-side calculations
- No data stored on any server
- No tracking, no analytics, no ads scripts
- Works offline once loaded
Frequently Asked Questions
How is a student loan payment calculated?
The same amortization formula as any loan: payment = balance × monthly rate / (1 − (1 + rate)^−n).
What is the standard repayment term?
10 years for federal loans — the default plan the calculator models.
What rate should I enter?
Your loan's actual rate, or the weighted average across multiple loans. Rates change yearly for new federal loans.
How much interest will I pay total?
The calculator totals it — for a $30,000 loan at 6.5% over 10 years it is roughly $10,900.
What are income-driven plans?
Plans that cap payments as a share of income and forgive the remainder after 20–25 years. They are not modelled here — a full analysis needs your income and family size.