About the Student Loan Calculator
This free student loan calculator helps people in the United States get a quick, private estimate before they talk to a lender, insurer, employer or advisor. There is no signup, nothing is stored on our servers and every result updates instantly in your browser.
How this calculator works
Monthly payment is calculated with the amortization formula using your balance, interest rate and repayment term. It models standard repayment, not income-driven plans.
Worked example
$35,000 at 6% over 10 years is about $389 per month and $11,630 in interest. Change any input above to see how the result moves, which is the fastest way to understand which factor matters most for you.
Tips to get a better result
Pay interest while in school if you can, and compare federal repayment plans before refinancing, because refinancing federal loans to private ones removes federal protections.
Key factors that change your result
Federal loans offer income-driven plans, deferment and possible forgiveness that this fixed-payment estimate does not model. Private loans may have variable rates. Interest can accrue while you are in school, which raises the starting balance.
Accuracy and limits
Every calculator on 100tools uses standard published formulas combined with average US market assumptions. Real offers depend on your credit profile, state, provider and personal circumstances, so treat the output as a starting point and confirm with an official quote or a licensed professional. Read more on our methodology page.
Frequently asked questions
Standard or income-driven repayment?
Standard pays off fastest. Income-driven lowers monthly cost but may cost more overall.
Does extra payment help?
Yes, extra payments go to principal after interest and shorten the term.
Is the student loan calculator free to use?
Yes. Every calculator on 100tools is free with no registration.
Do you store the numbers I enter?
No. Calculations run in your browser and nothing you type is sent to our servers.