What Is the Student Loan Calculator?
A student loan calculator projects what you will pay each month and in total to repay education debt. Enter your balance, rate, and term to see the monthly payment and the lifetime interest cost — a key input for choosing a repayment plan or deciding how aggressively to pay down the loan.
How to use this calculator
Type your numbers into the fields above. The results change the moment you edit any input, so you can try one scenario after another and see exactly what moves. Most calculators show a short summary of the key figures, a line-by-line breakdown underneath, and — where it applies — a year-by-year schedule you can export to a spreadsheet. Everything runs in your browser; nothing is stored or sent anywhere. Treat the output as a planning estimate, not as final word on a real decision.
The Formula
The monthly payment uses the standard amortization formula with the annual rate divided by 12 and the term in months. Total interest is the sum of all payments minus the original balance. Shorter terms raise the payment but sharply cut interest.
Worked Example
A $35,000 balance at 5.5% over 10 years costs about $379 per month and roughly $10,500 in interest. Stretching to 20 years drops the payment to about $241 but pushes total interest above $22,000.
Tips for the Most Accurate Estimate
- Pay more than the minimum to cut interest and finish sooner.
- Compare standard, graduated, and income-driven plans for your situation.
- Target high-rate loans first when you have several to repay.
- Auto-pay often earns a 0.25% rate discount — take it.
- Consider refinancing only after weighing lost federal protections.
Frequently Asked Questions
Q: Should I use a longer term to lower payments?
A longer term reduces the monthly bill but increases total interest substantially. Use it only if the lower payment is necessary for cash flow.
Q: Do extra payments really help?
Yes. Extra principal payments reduce the balance immediately, so less interest accrues — every extra dollar saves more than a dollar of future interest.
Q: Are federal and private loans calculated the same?
The math is identical, but federal loans offer income-driven plans and forgiveness that private loans typically do not.